CDC 4b051 Vol 1
Yeah figured id post an updated version of cdc for all u scrubs out there
edit code 03
Questions and Answers
- 1.
What term describes the purpose of the Air Force Medical Service unit’s purpose?
- A.
Vision
- B.
Mission
- C.
Leadership
- D.
Directional
Correct Answer
B. MissionExplanation
dont question my answers from here onRate this question:
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- 2.
Sustaining the performance, health and fitness of every Airman is best described as a part of the Air Force Medical Service’s
- A.
Values
- B.
Vision
- C.
Mission
- D.
Strategy
Correct Answer
C. MissionExplanation
The correct answer is "mission". Sustaining the performance, health, and fitness of every Airman is a crucial objective of the Air Force Medical Service, which aligns with their overall mission. The mission of the Air Force Medical Service is to provide medical support to ensure the readiness and well-being of all Air Force personnel. This includes maintaining the physical and mental health of Airmen to ensure they can perform their duties effectively.Rate this question:
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- 3.
Air Force Medical Service effects can best be describe as the
- A.
Ability to provide defensive measures during a contingency
- B.
Ability to achieve Air Force Medical Service objectives
- C.
Health service support the medics bring to the fight
- D.
War-fighting skills the medics bring to the fight
Correct Answer
C. Health service support the medics bring to the fightExplanation
The correct answer is "health service support the medics bring to the fight." This answer best describes the effects of Air Force Medical Service because it emphasizes the role of medics in providing healthcare support during combat situations. The medics play a crucial role in delivering medical care and support to the military personnel in the field, ensuring their health and well-being during a contingency. This answer highlights the importance of the medical service provided by the medics in a combat scenario.Rate this question:
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- 4.
Which Air Force Medical Service effects include identifying, assessing and controllinghealth hazards?
- A.
Restore health
- B.
Prevent casualties
- C.
Enhance human performance
- D.
Ensuring a fit and health force
Correct Answer
B. Prevent casualtiesExplanation
The correct answer is "Prevent casualties." The Air Force Medical Service is responsible for identifying, assessing, and controlling health hazards to ensure the safety and well-being of the force. By preventing casualties, they aim to maintain the health and fitness of the personnel, minimizing any potential harm or injuries.Rate this question:
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- 5.
All aerospace medicine squadron members working together to accomplish the mission best describes
- A.
Aerospace vision.
- B.
Aerospace mission
- C.
The Team Aerospace concept
- D.
The Aerospace Working Group
Correct Answer
C. The Team Aerospace conceptExplanation
The correct answer is the Team Aerospace concept. This concept refers to all aerospace medicine squadron members collaborating and working together to achieve the mission effectively. It emphasizes the importance of teamwork and cooperation in the aerospace field.Rate this question:
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- 6.
Providing health risk assessment capability to enhance a commander’s decisions is part of the bioenvironmental engineering
- A.
Values
- B.
Vision
- C.
Mission
- D.
Strategy
Correct Answer
C. MissionExplanation
The given correct answer is "mission". This is because providing health risk assessment capability to enhance a commander's decisions is a specific objective or goal that falls under the overall mission of bioenvironmental engineering. The mission of bioenvironmental engineering is to protect and enhance the health and well-being of military personnel and the community by identifying and evaluating environmental health hazards. Therefore, providing health risk assessment capability aligns with this mission and is an important part of it.Rate this question:
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- 7.
Which example best describes bioenvironmental engineering’s primary capability—Conductpredictive exposure assessments?
- A.
Use occupational and environmental health data for predicting potential exposures
- B.
Effectively anticipate and recognize when physical health threats exist.
- C.
Recommend measures to eliminate or control physical health threats
- D.
Responds to both deliberate and crisis events
Correct Answer
A. Use occupational and environmental health data for predicting potential exposuresExplanation
The example that best describes bioenvironmental engineering's primary capability of conducting predictive exposure assessments is using occupational and environmental health data for predicting potential exposures. This means that bioenvironmental engineers analyze data related to occupational and environmental health to predict and assess potential exposures to harmful substances or hazards. By doing so, they can identify and mitigate potential risks to individuals and the environment.Rate this question:
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- 8.
Which agencies would bioenvironmental engineering interface with to correct a drinkingwater standard violation?
- A.
Air Force Inspection Agency and the Environmental Protection Agency.
- B.
Air Force Medical Operations and the Air Force Inspection Agency
- C.
Civil Engineering and the Environmental Protection Agency
- D.
Civil Engineering and the Air Force Inspection Agency.
Correct Answer
C. Civil Engineering and the Environmental Protection AgencyExplanation
Bioenvironmental engineering is responsible for ensuring the safety and quality of drinking water. In order to correct a drinking water standard violation, bioenvironmental engineering would likely interface with both Civil Engineering and the Environmental Protection Agency. Civil Engineering would be involved in addressing any infrastructure or engineering issues that may be contributing to the violation, such as problems with the water supply system. The Environmental Protection Agency would provide guidance and regulations on drinking water standards and may be involved in overseeing the corrective actions taken by bioenvironmental engineering.Rate this question:
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- 9.
Which forum meets once per month to review, discuss, and approve issues such as industrial hygiene recommendations?
- A.
Environmental, Safety and Occupational Health Council
- B.
Occupational and Environmental Health Working Group
- C.
Aerospace Occupational and Environmental Council
- D.
Aerospace Medicine Council
Correct Answer
B. Occupational and Environmental Health Working GroupExplanation
The Occupational and Environmental Health Working Group is the correct answer because it is a forum that meets once per month to review, discuss, and approve issues related to industrial hygiene recommendations. The other options, such as the Environmental, Safety and Occupational Health Council, Aerospace Occupational and Environmental Council, and Aerospace Medicine Council, may have different focuses or responsibilities that do not specifically include industrial hygiene recommendations.Rate this question:
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- 10.
Which agency typically formulates new policy for the career field?
- A.
United States Air Force School of Aerospace Medicine
- B.
Occupational, Safety and Health Administration
- C.
Major Command - Bioenvironmental Engineering
- D.
Air Force Medical Service
Correct Answer
D. Air Force Medical ServiceExplanation
The Air Force Medical Service is typically responsible for formulating new policy for the career field. This agency focuses on the medical aspects of the Air Force and plays a crucial role in developing policies and guidelines related to healthcare, occupational health, and safety within the Air Force. They work closely with other agencies and departments to ensure the well-being and health of Air Force personnel.Rate this question:
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- 11.
Which agency would you consult for assistance when interpreting a policy?
- A.
United States Air Force School of Aerospace Medicine
- B.
Occupational, Safety and Health Administration.
- C.
Major Command - Bioenvironmental Engineering
- D.
Air Force Medical Service
Correct Answer
C. Major Command - Bioenvironmental EngineeringExplanation
The Major Command - Bioenvironmental Engineering would be the agency to consult for assistance when interpreting a policy. This is because bioenvironmental engineering is responsible for ensuring the health and safety of individuals in the Air Force, particularly in relation to environmental factors. They would have the expertise and knowledge to interpret policies related to occupational safety and health, making them the appropriate agency to consult in this scenario.Rate this question:
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- 12.
If your responsibilities at a deployed location include performing confirmatory sampling ofsuspected contamination and analyzing associated risks jointly with civil engineering then you are a member of the
- A.
Medical Nuclear, Biological and Chemical (MNBC) team
- B.
Preventive and Aerospace Medicine (PAM) team
- C.
Air Force Radiation Assessment Team
- D.
Medical Global Reach Laydown Team
Correct Answer
A. Medical Nuclear, Biological and Chemical (MNBC) teamExplanation
If your responsibilities at a deployed location include performing confirmatory sampling of suspected contamination and analyzing associated risks jointly with civil engineering, then you are a member of the Medical Nuclear, Biological and Chemical (MNBC) team. This team is responsible for handling and assessing potential nuclear, biological, and chemical threats in order to protect the health and safety of military personnel and civilians in a deployed location. They work closely with civil engineering to analyze risks and develop strategies to mitigate any potential contamination.Rate this question:
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- 13.
If you are deployed following a radiological incident and asked to identify the radiologicalenvironment along with providing recommendations for protective actions then you are a member of the
- A.
Medical Nuclear, Biological and Chemical (MNBC) team
- B.
Preventive and Aerospace Medicine (PAM) team
- C.
Air Force Radiation Assessment Team
- D.
Medical Global Reach Laydown Team
Correct Answer
C. Air Force Radiation Assessment TeamExplanation
The Air Force Radiation Assessment Team is responsible for identifying the radiological environment and providing recommendations for protective actions in the event of a radiological incident. They are specifically trained to assess radiation levels and determine the appropriate measures to mitigate the risks associated with radiation exposure. This team plays a crucial role in ensuring the safety of personnel and the environment in such situations.Rate this question:
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- 14.
If you are deployed for the purpose of identifying the radiological environment andrecommend protective actions to insure the health and safety of AF and DOD personnel and the surrounding community following radiological incidents then you are a member of which unit type code (UTC)?
- A.
Medical Nuclear, Biological and Chemical Team
- B.
Preventive and Aerospace Medicine Team
- C.
Air Force Radiation Assessment Team
- D.
Medical Global Reach Laydown Team
Correct Answer
A. Medical Nuclear, Biological and Chemical TeamExplanation
The correct answer is Medical Nuclear, Biological and Chemical Team. This team is responsible for identifying the radiological environment and recommending protective actions in order to ensure the health and safety of Air Force and Department of Defense personnel, as well as the surrounding community, following radiological incidents.Rate this question:
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- 15.
Matter has three basic forms: solid, liquid and gas. Its physical state is dependent upon the
- A.
Temperature and atmospheric pressure
- B.
Atmospheric pressure only
- C.
Mass and weight
- D.
Mass only
Correct Answer
A. Temperature and atmospHeric pressureExplanation
The physical state of matter, whether it is solid, liquid, or gas, is determined by both temperature and atmospheric pressure. Temperature affects the kinetic energy of the particles, causing them to move faster or slower and change their arrangement. Atmospheric pressure, on the other hand, determines the force exerted on the particles, affecting their ability to move and interact with each other. Therefore, both temperature and atmospheric pressure play a crucial role in determining the physical state of matter.Rate this question:
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- 16.
Which physical states of matter can be easily compressed?
- A.
Solid and liquid
- B.
Liquid and gas
- C.
Liquid only
- D.
Gas only
Correct Answer
D. Gas onlyExplanation
Gases possess high compressibility due to their molecular nature and significant intermolecular spaces. When subjected to pressure, gas particles can be compressed closer together, reducing the volume they occupy. This property allows gases to be easily compressed, making them adaptable to changes in pressure and volume.Rate this question:
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- 17.
Which of the physical states of matter lacks both volume and shape?
- A.
Solid and liquid
- B.
Liquid and gas.
- C.
Liquid only
- D.
Gas only.
Correct Answer
D. Gas only.Explanation
Gas is the physical state of matter that lacks both volume and shape. Unlike solids and liquids, gases do not have a fixed shape or volume. They can expand and fill the space they are in, taking the shape of their container. The particles in a gas are highly energetic and move freely, allowing them to spread out and occupy any available space. Therefore, gas is the correct answer as it lacks both volume and shape.Rate this question:
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- 18.
Which example best describes a solution?
- A.
Container of methane gas and carbon dioxide gas
- B.
Ethyl alcohol dissolved in water
- C.
Beaker of sodium hydroxide
- D.
Container of argon gas
Correct Answer
B. Ethyl alcohol dissolved in waterExplanation
The example of ethyl alcohol dissolved in water best describes a solution because a solution is a homogeneous mixture where one or more substances are dissolved in a solvent. In this example, ethyl alcohol is the solute and water is the solvent, resulting in a clear and uniform mixture. The other options do not fit the definition of a solution as they are either a container of gases or a solid in a beaker.Rate this question:
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- 19.
The number of protons in the nucleus of an atom is equal to the
- A.
Atomic number
- B.
Atomic weight
- C.
Electron number
- D.
Electron weight
Correct Answer
A. Atomic numberExplanation
The number of protons in the nucleus of an atom is equal to the atomic number. The atomic number represents the unique identity of an element and determines its position in the periodic table. It is also equal to the number of electrons in a neutral atom. Atomic weight, electron number, and electron weight do not directly correspond to the number of protons in the nucleus.Rate this question:
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- 20.
Where are the noble gases located within the periodic table?
- A.
Far right column
- B.
Far left column
- C.
Bottom row
- D.
Top row
Correct Answer
A. Far right columnExplanation
The noble gases are located in the far right column of the periodic table. This column is known as Group 18 or the "noble gases" group. The noble gases include elements such as helium, neon, argon, krypton, xenon, and radon. These gases are characterized by their low reactivity and full outer electron shells, making them stable and non-reactive. Their placement in the far right column reflects their unique electronic configurations and their tendency to not readily form compounds with other elements.Rate this question:
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- 21.
In what electron shell does most of the reaction activity take place within an atom?
- A.
Closest to the nucleus
- B.
Outermost
- C.
Innermost
- D.
Middle
Correct Answer
B. OutermostExplanation
Most of the reaction activity takes place in the outermost electron shell of an atom. This is because the outermost shell, also known as the valence shell, contains the valence electrons, which are the electrons involved in chemical bonding and reactions. These valence electrons are more easily accessible to other atoms or molecules, allowing for the formation of chemical bonds and the occurrence of reactions. The innermost and middle shells, on the other hand, are generally more stable and less reactive, as they are closer to the nucleus and have a stronger attraction to the positively charged protons.Rate this question:
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- 22.
Elements form compounds in an attempt to
- A.
Become more stable
- B.
Disperse energy
- C.
Become inert
- D.
Gain energy
Correct Answer
A. Become more stableExplanation
Elements form compounds in an attempt to become more stable. This is because elements have a tendency to fill their outermost electron shell, which is the most stable configuration. By forming compounds, elements can share, donate, or accept electrons to achieve a full outer shell, thereby increasing their stability. This process allows them to attain a lower energy state and reduces their reactivity, making them less likely to undergo chemical reactions.Rate this question:
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- 23.
A cation has a positive charge because the
- A.
Atom has more neutrons than protons
- B.
Atom has fewer neutrons than protons
- C.
Atom has more protons than electrons.
- D.
Atom has fewer protons than electrons
Correct Answer
C. Atom has more protons than electrons.Explanation
A cation is an atom that has lost one or more electrons, resulting in a positive charge. Since electrons have a negative charge, when an atom loses electrons, it has more protons than electrons, leading to a net positive charge. Therefore, the correct answer is that a cation has a positive charge because the atom has more protons than electrons.Rate this question:
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- 24.
An anion has a negative charge when the
- A.
Atom has more neutrons than protons
- B.
Atom has fewer neutrons than protons
- C.
Atom has more protons than electrons
- D.
Atom has fewer protons than electrons
Correct Answer
D. Atom has fewer protons than electronsExplanation
An anion has a negative charge because it has gained one or more electrons. Since electrons have a negative charge, an atom with more electrons than protons will have a net negative charge, resulting in an anion. Therefore, the correct answer is "atom has fewer protons than electrons."Rate this question:
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- 25.
Unsatured aliphatic hydrocarbons as opposed to saturated compounds are
- A.
More chemically reactive
- B.
Less chemically reactive
- C.
Do not react at all
- D.
React equally.
Correct Answer
A. More chemically reactiveExplanation
Unsaturated aliphatic hydrocarbons, unlike saturated compounds, have double or triple bonds between carbon atoms. These double or triple bonds provide sites for chemical reactions to occur, making unsaturated hydrocarbons more chemically reactive. In contrast, saturated compounds have only single bonds, which are relatively stable and less likely to undergo chemical reactions. Therefore, unsaturated aliphatic hydrocarbons are more chemically reactive compared to saturated compounds.Rate this question:
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- 26.
If 50 grams of sodium chloride is dissolved in enough water to make 500 grams of solution,what is the percent by mass?
- A.
.1 percent
- B.
10 percent
- C.
25 percent
- D.
50 percent
Correct Answer
B. 10 percentExplanation
The percent by mass can be calculated by dividing the mass of the solute (sodium chloride) by the mass of the solution and multiplying by 100. In this case, the mass of the solute is 50 grams and the mass of the solution is 500 grams. Dividing 50 by 500 and multiplying by 100 gives us 10 percent.Rate this question:
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- 27.
What type of solution contains large amounts of both a weak acid and its conjugate base and as a result resists change in its ph?
- A.
Buffered
- B.
Alkaline
- C.
Neutral
- D.
Acidic
Correct Answer
A. BufferedExplanation
A buffered solution contains large amounts of both a weak acid and its conjugate base. This combination allows the solution to resist changes in its pH when small amounts of acid or base are added. The weak acid can neutralize any added base, while the conjugate base can neutralize any added acid. This equilibrium between the acid and its conjugate base helps maintain the pH of the solution relatively stable, making it buffered.Rate this question:
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- 28.
Boyle’s law states that a gas volume is inversely proportional to its pressure, at a constanttemperature. Which of the following statements best describes this relationship?
- A.
As pressure increases, volume decreases
- B.
As pressure increases, volume increases
- C.
As pressure increases, volume remains constant
- D.
As pressure decreases, volume remains constant
Correct Answer
A. As pressure increases, volume decreasesExplanation
Boyle's law states that as the pressure exerted on a gas increases, its volume decreases, assuming that the temperature remains constant. This means that there is an inverse relationship between pressure and volume. When pressure is increased, the gas molecules are forced closer together, resulting in a decrease in volume. Conversely, when pressure is decreased, the gas molecules have more space to move and the volume increases. Therefore, the statement "As pressure increases, volume decreases" accurately describes this relationship.Rate this question:
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- 29.
Charles’s law states that at constant pressure the volume of a fixed mass of a given gas isdirectly proportional to the temperature (in Kelvin). Which of the following statements bestdescribes this relationship?
- A.
As temperature decreases, volume increases
- B.
As temperature decreases, volume decreases
- C.
As temperature decreases, volume remains constant
- D.
As temperature increases, volume remains constant
Correct Answer
B. As temperature decreases, volume decreasesExplanation
According to Charles's law, at constant pressure, the volume of a fixed mass of gas is directly proportional to the temperature in Kelvin. This means that as the temperature decreases, the volume of the gas also decreases. This relationship holds true as long as the pressure remains constant.Rate this question:
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- 30.
The purpose of the plasma membrane within a cell is to
- A.
Break down protein, carbohydrates, acids, and foreign substances that may enter the cell.
- B.
Separate and protect a cell from its surrounding environment
- C.
Promote electron transport and the citric and fatty acid cycles
- D.
Break down toxic substances and distribute proteins
Correct Answer
B. Separate and protect a cell from its surrounding environmentExplanation
The plasma membrane is a selectively permeable barrier that separates the internal environment of a cell from its external surroundings. It controls the entry and exit of substances, allowing nutrients to enter the cell and waste products to be expelled. Additionally, the plasma membrane plays a crucial role in maintaining the cell's internal conditions, such as regulating the concentration of ions and controlling the movement of molecules. Therefore, its primary function is to separate and protect the cell from its surrounding environment.Rate this question:
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- 31.
Which statement best describes the life cycle of a cell?
- A.
The growth of a cell until it divides and becomes two new cells
- B.
The division of the nuclear material and of the cytoplasm
- C.
The determining factor in how the cell will function
- D.
The period between two successive cell divisions
Correct Answer
A. The growth of a cell until it divides and becomes two new cellsExplanation
The correct answer is "The growth of a cell until it divides and becomes two new cells." This statement accurately describes the life cycle of a cell, as it highlights the process of cell growth followed by cell division. The cell undergoes various stages, including DNA replication and cell growth, before eventually dividing into two daughter cells. This process is essential for the growth and development of organisms.Rate this question:
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- 32.
The types of cells that are most affected by exposing them to ionizing radiation are thosethat
- A.
Reproduce slowly
- B.
Reproduce rapidly
- C.
Are tightly packed together
- D.
Are loosely packed together
Correct Answer
B. Reproduce rapidlyExplanation
Cells that reproduce rapidly are most affected by exposure to ionizing radiation because radiation damages DNA, which is crucial for cell division and replication. Rapidly dividing cells have a higher rate of DNA replication, making them more susceptible to radiation-induced DNA damage. This can lead to cell death or mutations, disrupting the normal functioning and potentially causing diseases such as cancer.Rate this question:
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- 33.
Which type of tissue is tightly packed together and serves as an interface tissue?
- A.
Epithelial
- B.
Connective
- C.
Nervous
- D.
Muscle
Correct Answer
A. EpithelialExplanation
Epithelial tissue is tightly packed together and serves as an interface tissue. It covers the surfaces of organs, lines body cavities, and forms glands. This tissue is responsible for protection, absorption, secretion, and sensation. It is composed of closely packed cells with little to no extracellular matrix between them. Epithelial tissue can be found in the skin, digestive tract, respiratory system, and other organs where a barrier is needed. It plays a crucial role in maintaining the integrity and function of various organs and systems in the body.Rate this question:
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- 34.
Which type of tissue is highly cellular and is well supplied with blood?
- A.
Epithelial
- B.
Connective
- C.
Nervous
- D.
Muscle
Correct Answer
D. MuscleExplanation
Muscle tissue is highly cellular and is well supplied with blood. This is because muscle tissue is responsible for movement and requires a constant supply of oxygen and nutrients, which are delivered by blood vessels. Additionally, muscle tissue contains a large number of cells called muscle fibers, which allow for contraction and relaxation, enabling movement.Rate this question:
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- 35.
Which type of tissue is responsible for coordinating and controlling many body activities?
- A.
Muscle
- B.
Nervous
- C.
Connective
- D.
Epithelial
Correct Answer
B. NervousExplanation
The nervous tissue is responsible for coordinating and controlling many body activities. It consists of specialized cells called neurons that transmit electrical signals throughout the body, allowing for communication between different parts of the body and the brain. This coordination and control is essential for various activities such as movement, sensory perception, and regulation of bodily functions.Rate this question:
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- 36.
Ultraviolet radiation can create a photochemical reaction in the very outside layer of the eyewhich kills the cells there. Which best describes a potential effect of overexposure?
- A.
Sunburned eyeballs
- B.
Collapsed sclera
- C.
Burst retina
- D.
Cataracts.
Correct Answer
A. Sunburned eyeballsExplanation
Overexposure to ultraviolet radiation can lead to sunburned eyeballs. This occurs when the outer layer of the eye is damaged by the photochemical reaction caused by UV radiation. The cells in this layer are killed, resulting in a sunburn-like effect on the eyeballs.Rate this question:
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- 37.
The Eustachian tube is critical to the function of the ear because it
- A.
Promotes drainage
- B.
Serves as a receptor for hearing
- C.
Conducts sound to the auditory nerve
- D.
Provides a means of equalizing pressure
Correct Answer
D. Provides a means of equalizing pressureExplanation
The Eustachian tube is critical to the function of the ear because it provides a means of equalizing pressure. This tube connects the middle ear to the back of the throat and helps regulate the pressure inside the ear. When the pressure inside and outside the ear is not balanced, it can cause discomfort or even affect hearing. The Eustachian tube opens and closes to equalize the pressure, allowing the middle ear to function properly.Rate this question:
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- 38.
What prevents nearly every known variety of germs from passing through the skin’ssurface?
- A.
The nerve endings in the dermis
- B.
The hornlike protein material called keratin
- C.
The overlapping arrangement of epidermal cells
- D.
The secretion of sebum by the sebaceous glands
Correct Answer
C. The overlapping arrangement of epidermal cellsExplanation
The overlapping arrangement of epidermal cells prevents nearly every known variety of germs from passing through the skin's surface. This arrangement creates a barrier that makes it difficult for germs to penetrate and enter the body.Rate this question:
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- 39.
When the skin gets cold, to help keep you warm the body
- A.
Constricts capillaries to reduce the amount of blood at the skin’s surface
- B.
Dilates capillaries to let warm blood near the skin’s surface
- C.
Secretes perspiration to insulate the skin
- D.
Secretes sebum to conserve heat
Correct Answer
A. Constricts capillaries to reduce the amount of blood at the skin’s surfaceExplanation
When the skin gets cold, the body constricts capillaries to reduce the amount of blood at the skin's surface. This is done to minimize heat loss from the body. By constricting the capillaries, less warm blood is allowed to reach the skin's surface, which helps to retain heat in the core of the body. This is an adaptive response to cold temperatures and helps to keep the body warm.Rate this question:
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- 40.
The main function of bones within the human body is to provide
- A.
A framework that supports and protects the soft organs of the body
- B.
Adjustments which contribute to joint stability
- C.
And maintain homeostasis
- D.
Movement and support
Correct Answer
A. A framework that supports and protects the soft organs of the bodyExplanation
Bones in the human body serve as a framework that supports and protects the soft organs. They provide a rigid structure that helps maintain the shape and form of the body, allowing the organs to function properly. Additionally, bones also protect vital organs like the brain, heart, and lungs from external forces and injuries. This support and protection provided by bones are crucial for the overall functioning and well-being of the body.Rate this question:
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- 41.
The function of the red marrow of the bones is to form
- A.
Red blood cells only
- B.
Blood platelets and synovial fluid only
- C.
Red blood cells and white blood cells only
- D.
Red and white blood cells and blood platelets
Correct Answer
D. Red and white blood cells and blood plateletsExplanation
The red marrow of the bones is responsible for the production of red and white blood cells, as well as blood platelets. Red blood cells carry oxygen throughout the body, white blood cells help fight off infections, and platelets are involved in blood clotting. Therefore, the red marrow plays a crucial role in the formation of these essential components of the blood.Rate this question:
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- 42.
The majority of joints in the adult human body are
- A.
Slightly movable
- B.
Freely movable
- C.
Immovable
- D.
Rigid
Correct Answer
B. Freely movableExplanation
The majority of joints in the adult human body are freely movable. This means that these joints allow for a wide range of movement, such as bending, flexing, extending, rotating, and more. Examples of freely movable joints include the shoulder joint, hip joint, and knee joint. These joints are characterized by the presence of synovial fluid, articular cartilage, and a joint capsule, which enable smooth and painless movement. The ability of these joints to move freely is essential for activities such as walking, running, and performing various physical tasks.Rate this question:
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- 43.
The most radiation-sensitive cells in the body are in the bone marrow. What can happenwhen they are exposed to intense irradiation?
- A.
Normal replacement of circulating blood cells is impaired
- B.
Neuroglia cells can no longer conduct nerve impulses.
- C.
Nerve cells are destroyed and cannot be replaced
- D.
Synovial fluid production is decreased
Correct Answer
A. Normal replacement of circulating blood cells is impairedExplanation
When bone marrow cells are exposed to intense irradiation, their ability to produce new blood cells is affected. The bone marrow is responsible for producing red blood cells, white blood cells, and platelets, which are essential for the normal functioning of the circulatory system and immune response. If the bone marrow cells are damaged by radiation, their ability to generate new blood cells is impaired, leading to a decrease in the production of circulating blood cells. This can result in conditions like anemia, increased susceptibility to infections, and impaired blood clotting.Rate this question:
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- 44.
The muscular system is comprised of specialized cells called muscle fibers. What is theirchief function?
- A.
Support
- B.
Connectivity
- C.
Contractibility
- D.
Joint stability
Correct Answer
C. ContractibilityExplanation
Muscle fibers have the chief function of contractibility. This means that they are able to shorten and generate force, allowing movement and the ability to exert force on bones and other tissues. Contractibility is essential for various bodily functions such as locomotion, maintaining posture, and even internal processes like digestion and circulation. Without contractibility, the muscular system would not be able to perform its crucial role in the body.Rate this question:
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- 45.
Which statement best describes skeletal muscle?
- A.
Muscle that contracts slowly and rhythmically
- B.
Muscle that contracts strong and rhythmically
- C.
Muscle that is dependent upon neighboring muscle fibers
- D.
Muscle that acts independently of neighboring muscle fibers
Correct Answer
D. Muscle that acts independently of neighboring muscle fibersExplanation
Skeletal muscle is made up of individual muscle fibers that can contract independently of each other. Unlike smooth muscle, which contracts slowly and rhythmically, skeletal muscle contracts strong and rhythmically. It is not dependent on neighboring muscle fibers for its contraction. Therefore, the statement "Muscle that acts independently of neighboring muscle fibers" best describes skeletal muscle.Rate this question:
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- 46.
The statement that best describes smooth muscle is muscle that
- A.
Contracts slowly and rhythmically
- B.
Contracts strong and rhythmically
- C.
Is dependent upon neighboring muscle fibers
- D.
Acts independently of neighboring muscle fibers
Correct Answer
A. Contracts slowly and rhythmicallyExplanation
Smooth muscle is a type of muscle that contracts slowly and rhythmically. Unlike skeletal muscle, which can contract quickly and forcefully, smooth muscle contracts at a slower pace. This type of muscle is found in the walls of organs and blood vessels, where it helps regulate their movements and functions. Smooth muscle is also able to contract independently of neighboring muscle fibers, allowing it to perform its functions autonomously.Rate this question:
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- 47.
What two major body systems work together to allow the body to regulate and maintainhomeostasis?
- A.
Lymphatic and respiratory
- B.
Endocrine and lymphatic
- C.
Nervous and endocrine
- D.
Muscular and nervous
Correct Answer
C. Nervous and endocrineExplanation
The nervous and endocrine systems work together to regulate and maintain homeostasis in the body. The nervous system controls and coordinates the body's responses to internal and external stimuli, while the endocrine system releases hormones that regulate various bodily functions. Together, these two systems help maintain a stable internal environment by communicating and coordinating the body's responses to changes in the external environment or internal conditions.Rate this question:
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- 48.
Within the nervous system, these highly specialized nerve cells function by conductingnerve impulses
- A.
Neuroglia
- B.
Dendrites
- C.
Neurons
- D.
Axial
Correct Answer
C. NeuronsExplanation
Neurons are highly specialized nerve cells that function by conducting nerve impulses within the nervous system. They are responsible for transmitting information throughout the body, allowing for communication between different parts of the body and the brain. Neuroglia are support cells that provide structural and functional support to neurons, but they do not conduct nerve impulses. Dendrites are extensions of neurons that receive signals from other neurons, while the axon is the long, slender projection that carries the nerve impulses away from the cell body. Therefore, neurons are the correct answer as they are the primary cells involved in conducting nerve impulses.Rate this question:
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- 49.
What is the main function of the central nervous system?
- A.
Controls the visceral motor nerve fibers
- B.
Serves as the major signal receptor and integration site
- C.
Transmits impulses from peripheral organs to the central nervous system
- D.
Transmits impulses from the central nervous system out to the peripheral organs
Correct Answer
B. Serves as the major signal receptor and integration siteExplanation
The central nervous system serves as the major signal receptor and integration site. This means that it receives signals and information from various parts of the body and integrates them to coordinate and regulate bodily functions. It processes sensory information, initiates motor responses, and controls the overall functioning of the body. The central nervous system includes the brain and spinal cord, which work together to receive, interpret, and respond to signals from the environment and the body's internal systems.Rate this question:
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- 50.
Central nervous system stimulants excite acetylcholine production. Which example bestrepresents a central nervous system stimulant?
- A.
Benzene
- B.
Acetone
- C.
Ethylene glycol
- D.
Organophosphate
Correct Answer
D. OrganopHospHateExplanation
Organophosphates are a class of chemicals that are known to stimulate the central nervous system. They work by inhibiting the enzyme acetylcholinesterase, which breaks down acetylcholine, a neurotransmitter involved in various brain functions. By inhibiting this enzyme, organophosphates increase the levels of acetylcholine in the brain, leading to overstimulation of the central nervous system. This can result in symptoms such as increased heart rate, heightened alertness, and improved cognitive function. Therefore, organophosphates best represent a central nervous system stimulant among the given options.Rate this question:
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Jan 09, 2024Quiz Edited by
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May 08, 2017Quiz Created by
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