Human Systems And Homeostasis
Questions and Answers
- 1.
1. In negative feedback system, an organ or tissue that corrects a change is called
- A.
A: a sensor
- B.
B. a stimulus
- C.
C. an effector
- D.
A coordinating centre
Correct Answer
C. C. an effectorExplanation
In a negative feedback system, an effector is the organ or tissue that corrects a change. It is responsible for counteracting the initial change and bringing the system back to its original state. The effector receives signals from a coordinating center, which detects the change and sends instructions to the effector to take corrective action. The effector then carries out the necessary actions to restore balance and maintain homeostasis in the body.Rate this question:
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- 2.
Which of the following statements if false
- A.
A. a sensor B. a stimulus C. an effector D. a coordinating centre homeostatic mechanisms must allow the body to protect agains pathogens
- B.
Homeostatic mechanisms must allow the body to make repairs when injured
- C.
Negative feedback usually results in disorders and eventual death
- D.
All of the above
Correct Answer
C. Negative feedback usually results in disorders and eventual deathExplanation
The correct answer is "negative feedback usually results in disorders and eventual death." This statement is false because negative feedback is a homeostatic mechanism that helps to maintain stability and balance in the body. It does not usually result in disorders and eventual death, but rather helps to prevent them.Rate this question:
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- 3.
______ are the cells, tissues, or organs that receive the final response
- A.
Effectors
- B.
Senders
- C.
Receptors
- D.
Control center
Correct Answer
A. EffectorsExplanation
Effectors are the cells, tissues, or organs that receive the final response. In a biological system, they are responsible for carrying out the appropriate action or response to a stimulus. Effectors can be muscles that contract or relax, glands that secrete hormones, or any other structures that bring about a specific response. They are the final step in the chain of events that occur in response to a stimulus, and their activation leads to the desired outcome or behavior.Rate this question:
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- 4.
______ feedback is the response of the system goes in the same direction as the change that initiated it to enhance the change.
- A.
Positive
- B.
Negative
- C.
Positive and negative
- D.
All the above
Correct Answer
A. PositiveExplanation
Positive feedback is the response of the system that goes in the same direction as the change that initiated it to enhance the change. In other words, when a change occurs in a system, positive feedback amplifies that change, leading to further increase in the same direction. This can create a self-reinforcing loop, where the system continues to move in the same direction until an external factor intervenes.Rate this question:
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- 5.
_________ feedback regulates by changing the oppositedirection of the change that is set in motion, or restores a change
- A.
Positive
- B.
Negative
- C.
Positive and Negative
- D.
All the above
Correct Answer
B. NegativeExplanation
Negative feedback regulates by changing the opposite direction of the change that is set in motion, or restores a change. This means that when there is an increase or decrease in a certain variable, negative feedback works to counteract that change and bring the variable back to its original state. It helps maintain stability and balance in biological systems.Rate this question:
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- 6.
._______ is body temperature below the set point, and _______ is body temperature above the set point.
- A.
Hyperthermia, Hypothermia
- B.
Hypothermia, hyperthermia
- C.
Temperature
Correct Answer
B. Hypothermia, hyperthermiaExplanation
Hypothermia refers to body temperature below the set point, while hyperthermia refers to body temperature above the set point.Rate this question:
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- 7.
System defends the body against pathogens and abnormal cells
- A.
Lymphatic
- B.
Endocrine
- C.
Digestive
- D.
Respiratory
Correct Answer
A. LympHaticExplanation
The lymphatic system is responsible for defending the body against pathogens and abnormal cells. It consists of lymph nodes, lymph vessels, and lymphatic organs such as the spleen and thymus. The lymphatic system helps to remove toxins, waste products, and foreign substances from the body, and also plays a role in immune response by producing and storing white blood cells. This system acts as a defense mechanism, protecting the body from infections and diseases.Rate this question:
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- 8.
_______ system breaks down food and absorbs it into the body.
- A.
Cardiovascular
- B.
Digestive
- C.
Urinary
- D.
Reproductive
Correct Answer
B. DigestiveExplanation
The digestive system breaks down food and absorbs it into the body. This process begins in the mouth, where food is chewed and mixed with saliva. It then travels down the esophagus and into the stomach, where it is further broken down by stomach acid. From there, it moves into the small intestine, where nutrients are absorbed into the bloodstream. The remaining waste then passes into the large intestine and is eliminated from the body as feces. The cardiovascular system, urinary system, and reproductive system do not play a direct role in breaking down and absorbing food.Rate this question:
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- 9.
_______ system transports molecules throughout body in the bloodstream
- A.
Respiratory
- B.
Cardiovascular
- C.
Digestive
- D.
Lymaphatic
Correct Answer
B. CardiovascularExplanation
The cardiovascular system is responsible for transporting molecules throughout the body in the bloodstream. It consists of the heart, blood vessels, and blood, which work together to deliver oxygen, nutrients, hormones, and other substances to the cells and tissues of the body. The heart pumps oxygenated blood from the lungs to the rest of the body, while the blood vessels carry the blood to different organs and tissues. This system plays a crucial role in maintaining the overall health and functioning of the body.Rate this question:
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- 10.
____ system protect body from the external environment
- A.
Integumentary
- B.
Digestive
- C.
Reproductive
- D.
Urinary
Correct Answer
A. IntegumentaryExplanation
The integumentary system is responsible for protecting the body from the external environment. It consists of the skin, hair, nails, and sweat glands, which act as a barrier against pathogens, UV radiation, and physical injuries. The skin also helps regulate body temperature and prevent dehydration. The digestive, reproductive, and urinary systems have different functions and do not primarily protect the body from the external environment.Rate this question:
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- 11.
________ system provides communication through hormones in the bloodstream.
- A.
Cardiovascular
- B.
Endocrine
- C.
Lymphatic
- D.
Intequmentary
Correct Answer
B. EndocrineExplanation
The endocrine system is responsible for communication through hormones in the bloodstream. Hormones are chemical messengers that are released by endocrine glands into the bloodstream and carried to target cells or organs. These hormones regulate various processes in the body including growth, metabolism, reproduction, and response to stress. Unlike the cardiovascular system which transports blood, the endocrine system uses the bloodstream as a means of delivering hormones to their target sites. Therefore, the endocrine system is the correct answer for this question.Rate this question:
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- 12.
_____ are two or more different tissues combined.
- A.
Complex tissues
- B.
Organ
- C.
Systems
- D.
Cells
Correct Answer
B. OrganExplanation
Organs are two or more different tissues combined. Organs are composed of multiple types of tissues that work together to perform a specific function in the body. Examples of organs include the heart, lungs, liver, and brain. Each organ has a unique structure and function, and they are essential for the overall functioning of the body.Rate this question:
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- 13.
The focus of anatomy is
- A.
Function
- B.
Structure
- C.
Function and structure
- D.
None of the above
Correct Answer
B. StructureExplanation
Anatomy is the study of the structure of organisms, including their organs, tissues, and cells. However, the focus of anatomy is not solely on structure but also on the function of these structures. Understanding how the different parts of the body work together to perform various functions is essential in anatomy. Therefore, the correct answer is "Function and structure."Rate this question:
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- 14.
The focus of physiology is
- A.
Function
- B.
Structure
- C.
Both of the above
- D.
None
Correct Answer
A. FunctionExplanation
Physiology is the study of how living organisms function. It focuses on understanding the processes and mechanisms that occur within the body to maintain homeostasis and carry out various biological functions. This includes studying the functions of organs, tissues, cells, and molecules, as well as the interactions between them. Therefore, the correct answer is "Function" as it accurately reflects the main focus of physiology.Rate this question:
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- 15.
- Negative Feedback maintains homeostasis. The ______________ senses a disturbance in homeostasis. Then the signal is sent to the _______________, which sends a message to the ____________ that will make the change and return the body back to its set point.
- 16.
Homeostasis can be defined as the existence and maintenance of a relatively constant enviroment within the body.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Homeostasis is a biological process that helps maintain a stable internal environment within the body, despite external changes. It involves various physiological mechanisms that regulate body temperature, pH levels, blood pressure, and other factors to keep them within a narrow range. Therefore, the statement that homeostasis is the existence and maintenance of a relatively constant environment within the body is accurate.Rate this question:
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- 17.
Negative feedback involves a constant back and forth in reactions to go in a straight line overall.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Negative feedback involves a constant back and forth in reactions, which ultimately helps to maintain stability and achieve a desired outcome. It works by detecting any deviation from the set point and triggering corrective actions to bring the system back to its desired state. This continuous loop of monitoring and adjusting ensures that the system remains on track and moves towards its goal, creating an overall straight line trajectory. Therefore, the given statement is true.Rate this question:
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Oct 08, 2024Quiz Edited by
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Aug 22, 2012Quiz Created by
Esaadi
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