6th Grade Science Chapter 11 Introduction To The Human Body
The Human Body is very complex and each part has a function that is met by the help of different organs. In chapter 11, we got introduced to the human body, some of the organs and their function. One of the main things in the body is the cell which is the main building block. Test out how much you remember by taking the test below.
Questions and Answers
- 1.
The human body contains about ______________ cells.
- A.
100,000
- B.
100 million
- C.
100 billion
- D.
100 trillion
Correct Answer
D. 100 trillionExplanation
The human body contains a vast number of cells, which are the basic building blocks of life. The correct answer is 100 trillion, indicating that there are approximately 100 trillion cells in the human body. This number is incredibly high, highlighting the complexity and intricacy of the human body's structure. Cells play various roles in maintaining bodily functions, and their sheer quantity showcases the remarkable nature of the human body.Rate this question:
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- 2.
All of these are types of tissues EXCEPT:
- A.
Blood tissue
- B.
Muscle tissue
- C.
Connective tissue
- D.
Nervous tissue
- E.
Epithelial tissue
Correct Answer
A. Blood tissueExplanation
Blood tissue is not one of the types of tissues in the human body. The four main types of tissues are muscle tissue, connective tissue, nervous tissue, and epithelial tissue. Blood is a fluid connective tissue that circulates throughout the body, but it is not considered a separate type of tissue.Rate this question:
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- 3.
________ tissue can contract or shorten. By doing so, it makes parts of your body move.
Correct Answer
Muscle, muscleExplanation
Muscle tissue is capable of contracting or shortening, which enables movement in different parts of the body. When muscles contract, they generate force, allowing them to pull on bones and joints, resulting in various movements such as walking, running, or lifting objects. This contraction ability of muscle tissue is essential for performing any voluntary or involuntary movements in the body.Rate this question:
- 4.
Starting with the cells, the levels of organization in an organism become more and more complex.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because cells are the basic building blocks of all living organisms. As we move up the levels of organization, cells combine to form tissues, tissues combine to form organs, organs combine to form organ systems, and organ systems work together to form a complete organism. Each level of organization adds complexity and specialization, allowing the organism to carry out more complex functions and processes. Therefore, the levels of organization in an organism do become more and more complex as we move from cells to the complete organism.Rate this question:
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- 5.
Skeletal muscle is also known as striated muscle.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Skeletal muscle is referred to as striated muscle because it is characterized by a striped appearance under a microscope. This is due to the arrangement of its contractile units, called sarcomeres, which give the muscle fibers a striped or striated appearance. Therefore, the statement that skeletal muscle is also known as striated muscle is true.Rate this question:
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- 6.
Muscles and bones work together, making your body move. The ________ tells your muscles when to act.
Correct Answer
Nervous, nervousExplanation
The correct answer is "nervous system". Muscles and bones work together to facilitate movement in the body. The nervous system is responsible for transmitting signals from the brain to the muscles, instructing them when to act. Without the nervous system, the muscles would not receive the necessary signals to initiate movement.Rate this question:
- 7.
All of the following systems play key roles in moving materials in your body EXCEPT:
- A.
Circulatory system
- B.
Nervous system
- C.
Respiratory system
- D.
Excretory system
- E.
Digestive system
Correct Answer
B. Nervous systemExplanation
The nervous system is responsible for transmitting signals throughout the body, coordinating movement, and controlling bodily functions. However, it does not play a direct role in moving materials in the body. The circulatory system transports oxygen, nutrients, and waste products, the respiratory system moves air in and out of the lungs, the excretory system eliminates waste from the body, and the digestive system processes and absorbs nutrients from food.Rate this question:
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- 8.
Which of these is NOT transported by the circulatory system?
- A.
Oxygen
- B.
Food
- C.
Carbon dioxide
- D.
Water
- E.
Cell wastes
- F.
None of the above
Correct Answer
F. None of the aboveExplanation
The circulatory system transports oxygen, food, carbon dioxide, water, and cell wastes throughout the body. Therefore, none of the options listed are NOT transported by the circulatory system.Rate this question:
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- 9.
To function properly, each part of your body must be able to communicate with other parts of your body.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Communication between different parts of the body is essential for proper functioning. This communication is achieved through various means such as nerve impulses, hormones, and chemical signals. Without this communication, coordination and regulation of bodily functions would be compromised, leading to dysfunction and potential health problems. Therefore, it is true that each part of the body must be able to communicate with other parts in order to function properly.Rate this question:
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- 10.
High levels of stress and long periods of stress can decrease a person's risk for many diseases.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
This statement is incorrect. High levels of stress and long periods of stress actually increase a person's risk for many diseases. Chronic stress can weaken the immune system, increase blood pressure, and contribute to the development of conditions such as heart disease, diabetes, and mental health disorders. Therefore, the correct answer is False.Rate this question:
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- 11.
Managing stress is an important part of a healthy lifestyle.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Managing stress is indeed an important part of a healthy lifestyle. High levels of stress can have negative effects on both our physical and mental health. It can lead to various health issues such as heart disease, high blood pressure, and weakened immune system. Therefore, it is crucial to adopt effective stress management techniques like exercise, relaxation techniques, and seeking social support to maintain a healthy lifestyle.Rate this question:
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- 12.
The condition in which an organism's internal environment is kept stable in spite of changes in the outside environment is called ________.
Correct Answer
homeostasisExplanation
Homeostasis refers to the ability of an organism to maintain a stable internal environment despite changes in the external environment. This is crucial for the proper functioning of cells, tissues, and organs. It involves various physiological processes that regulate body temperature, pH levels, blood sugar, and other factors within a narrow range. Homeostasis ensures that the body can adapt and respond to external stimuli while keeping its internal conditions balanced.Rate this question:
- 13.
________ is the reaction of your body to possibly threatening, challenging, or uncomfortable events.
Correct Answer
Stress, stressExplanation
Stress is the reaction of your body to possibly threatening, challenging, or uncomfortable events. It is a natural response that prepares the body to deal with perceived danger or pressure. When faced with stress, the body releases hormones, such as adrenaline, which increase heart rate, blood pressure, and energy levels. Stress can have both physical and psychological effects, and if not managed properly, it can lead to negative health consequences. Therefore, it is important to find healthy ways to cope with stress and maintain overall well-being.Rate this question:
- 14.
Long-term stress can cause a disruption of homeostasis.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Long-term stress can cause a disruption of homeostasis because the body's natural balance and equilibrium can be thrown off by the constant activation of the stress response. This can lead to various physiological and psychological changes, such as increased heart rate, elevated blood pressure, impaired immune function, and emotional disturbances. The body's ability to regulate and maintain stability in its internal environment is compromised, resulting in a disruption of homeostasis.Rate this question:
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- 15.
What is the function of your skeleton?
- A.
To provide shape and support.
- B.
To enable movement.
- C.
To protect your organs.
- D.
To produce blood cells.
- E.
To store minerals and other materials until your body needs them.
- F.
All of the above.
- G.
None of the above.
Correct Answer
F. All of the above.Explanation
The skeleton has multiple functions in the body. It provides shape and support, enabling the body to maintain its structure. It also allows movement by providing attachment points for muscles and acting as a lever system. The skeleton plays a crucial role in protecting vital organs, such as the brain, heart, and lungs. Additionally, bone marrow within the skeleton produces red and white blood cells, making it responsible for blood cell production. Lastly, the skeleton acts as a mineral storage, storing minerals and other materials until the body needs them. Therefore, all of the given options accurately describe the functions of the skeleton.Rate this question:
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- 16.
An adult skeleton is made up of about _______ bones of different shapes and sizes.
- A.
225
- B.
175
- C.
309
- D.
206
Correct Answer
D. 206Explanation
An adult skeleton is made up of about 206 bones of different shapes and sizes. This is the correct answer because it is a well-known fact that the human adult skeleton consists of 206 bones. These bones vary in size and shape, and they provide structure, support, and protection for the body.Rate this question:
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- 17.
A baby's skeleton has between ________________ bones at birth, many of which fuse together.
- A.
300 – 350
- B.
200 – 250
- C.
100 – 150
- D.
400 – 450
Correct Answer
A. 300 – 350Explanation
A baby's skeleton has between 300-350 bones at birth, many of which fuse together as the baby grows.Rate this question:
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- 18.
Most of the body's bones are associated with muscles, which pull on the bones to make them move.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because most of the body's bones are indeed connected to muscles. Muscles are attached to bones through tendons, and when the muscles contract, they pull on the bones, causing them to move. This is how our body is able to perform various movements and actions.Rate this question:
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- 19.
Some of your bones produce blood cells.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Some bones in the human body, such as the long bones and the pelvic bones, contain bone marrow, which is responsible for the production of blood cells. Red blood cells, white blood cells, and platelets are all produced in the bone marrow. Therefore, it is correct to say that some of our bones produce blood cells.Rate this question:
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- 20.
Some of your bones produce muscle cells.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Bones do not produce muscle cells. Bones are a type of connective tissue that provide support and protection for the body, while muscle cells are found in the muscular system and are responsible for movement. The correct answer is False.Rate this question:
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- 21.
A ________ is a place where 2 bones come together.
Correct Answer
Joint, jointExplanation
A joint is a place where two bones come together. It is the point of connection between two bones, allowing movement and providing support to the skeletal system. Joints can be found throughout the body and are crucial for mobility and flexibility.Rate this question:
- 22.
You have 2 kinds of joints: immovable and movable.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The statement is true because joints in the human body can be classified into two main types: immovable joints, also known as fibrous joints, and movable joints, also known as synovial joints. Immovable joints are found in the skull and pelvis, where the bones are tightly fused together and do not allow any movement. On the other hand, movable joints are found in areas such as the elbows, knees, and shoulders, where bones are connected by cartilage and ligaments, allowing for a wide range of motion.Rate this question:
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- 23.
The bones of the skull are held together by movable joints.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The bones of the skull are actually held together by immovable joints called sutures. These sutures allow for very little movement and provide stability and protection for the brain. Unlike movable joints found in other parts of the body, such as the knee or elbow, the joints in the skull do not allow for any significant movement. Therefore, the statement that the bones of the skull are held together by movable joints is false.Rate this question:
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- 24.
The bones in movable joints are held together by tendons.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The bones in movable joints are not held together by tendons, but rather by ligaments. Tendons are fibrous connective tissues that attach muscles to bones, while ligaments are fibrous connective tissues that connect bones to other bones in movable joints. Therefore, the correct answer is false.Rate this question:
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- 25.
The bones in movable joints are held together by ________, which are made of strong connective tissue.
Correct Answer
Ligaments, ligamentsExplanation
Ligaments are strong connective tissues that hold the bones in movable joints together. They provide stability and support to the joint, preventing excessive movement and maintaining proper alignment. Without ligaments, the bones would not be able to stay in place and the joint would be unstable. Therefore, ligaments play a crucial role in ensuring the integrity and functionality of movable joints.Rate this question:
- 26.
Bones are complex living structures that grow, develop, and repair themselves.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Bones are indeed complex living structures that undergo growth, development, and repair. They are composed of living cells, such as osteoblasts and osteoclasts, that continuously remodel and regenerate bone tissue. This process allows bones to adapt to mechanical stress, heal fractures, and maintain their strength and integrity. Therefore, the statement "Bones are complex living structures that grow, develop, and repair themselves" is true.Rate this question:
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- 27.
From outside to the inside, the correct order of bone layers is as follows:
- A.
Spongy bone, compact phone, marrow
- B.
Compact bone, spongy bone, marrow
- C.
Marrow, spongy bone, compact phone
- D.
Compact bone, marrow, spongy bone
Correct Answer
B. Compact bone, spongy bone, marrowExplanation
The correct order of bone layers from outside to inside is compact bone, spongy bone, and marrow. Compact bone is the dense outer layer of bone that provides strength and protection. Spongy bone is the inner layer that consists of a network of trabeculae, providing support and flexibility. Marrow is the soft, fatty tissue found inside the bone cavities, responsible for producing blood cells.Rate this question:
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- 28.
Bone feels as hard as a rock because it is made of tightly packed minerals – mainly _________ and __________.
- A.
Calcium and iron
- B.
Calcium and carbon
- C.
Phosphorus and calcium
- D.
Phosphorus and magnesium
Correct Answer
C. pHospHorus and calciumExplanation
Bone feels as hard as a rock because it is made of tightly packed minerals, mainly phosphorus and calcium. These minerals provide the strength and rigidity needed to support the body and protect organs. Phosphorus is a key component of the mineral hydroxyapatite, which forms the majority of the bone matrix. Calcium, on the other hand, helps to strengthen and mineralize the bone structure. Together, phosphorus and calcium create a dense and durable material that gives bones their hardness.Rate this question:
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- 29.
_________________ is a condition in which bones become weak and break easily due to mineral loss.
- A.
Demineralization
- B.
Osteotomy
- C.
Degradation
- D.
Osteoporosis
Correct Answer
D. OsteoporosisExplanation
Osteoporosis is a condition in which bones become weak and break easily due to mineral loss. This condition is characterized by a decrease in bone density and mass, making the bones more susceptible to fractures. Osteoporosis is most commonly seen in older individuals, particularly women after menopause, but it can also occur in younger individuals due to certain medical conditions or medications. Regular exercise, a balanced diet rich in calcium and vitamin D, and certain medications can help prevent or manage osteoporosis.Rate this question:
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- 30.
Muscles not under your conscious control are called voluntary muscles.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Muscles not under your conscious control are called involuntary muscles, not voluntary muscles.Rate this question:
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- 31.
Muscles under your conscious control are called voluntary muscles.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Voluntary muscles are muscles that we can consciously control. These muscles allow us to perform movements and actions based on our own will. Examples of voluntary muscles include the muscles in our arms, legs, and face. Therefore, the statement "Muscles under your conscious control are called voluntary muscles" is true.Rate this question:
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- 32.
A strong connective tissue called a ________ attaches the muscle to bone.
Correct Answer
Tendon, tendonExplanation
The answer is "tendon" because a tendon is a strong connective tissue that attaches muscle to bone. It is responsible for transmitting the force generated by the muscle to the bone, allowing movement and providing stability to the skeletal system. Since the question states that the correct answer is "tendon" twice, it reinforces the fact that a tendon is the correct answer for the given statement.Rate this question:
- 33.
Smooth muscles are involuntary muscles.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Smooth muscles are involuntary muscles because they are not under conscious control. They are found in the walls of organs and blood vessels, and they function automatically to regulate various bodily processes such as digestion, blood flow, and breathing. Unlike skeletal muscles, which can be consciously controlled, smooth muscles work involuntarily and are regulated by the autonomic nervous system.Rate this question:
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- 34.
Smooth muscle controls certain movements inside your body, such as moving food through your digestive system.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Smooth muscle is a type of muscle tissue that is found in the walls of internal organs and structures, such as the digestive system. It is responsible for controlling involuntary movements, including the movement of food through the digestive system. Therefore, the statement that smooth muscle controls certain movements inside the body, such as moving food through the digestive system, is true.Rate this question:
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- 35.
Cardiac muscle is voluntary.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Cardiac muscle is actually involuntary. It is found only in the heart and is responsible for the continuous pumping of blood throughout the body. Unlike skeletal muscle, which is under voluntary control, cardiac muscle contracts and relaxes involuntarily to maintain the heart's rhythm and function.Rate this question:
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- 36.
Smooth muscle tires slowly.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Smooth muscle is a type of muscle tissue that is found in the walls of hollow organs, such as the stomach, intestines, and blood vessels. Unlike skeletal muscle, smooth muscle does not tire quickly. It is designed to contract and relax slowly, allowing for sustained contractions over long periods of time. This is beneficial for functions such as maintaining blood pressure, regulating digestion, and controlling the movement of substances through the body. Therefore, the statement "Smooth muscle tires slowly" is true.Rate this question:
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- 37.
Skeletal or striated muscle tires slowly.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Skeletal or striated muscle does not tire slowly. In fact, it is capable of sustaining long periods of activity without fatigue. This is due to its unique structure and the presence of specialized muscle fibers that can generate and sustain high levels of force for extended periods of time. Therefore, the statement that skeletal or striated muscle tires slowly is false.Rate this question:
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- 38.
Cardiac muscle tires quickly.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Cardiac muscle does not tire quickly. Unlike skeletal muscle, which can fatigue after prolonged use, cardiac muscle is designed to contract continuously without tiring. This is essential for the heart to continuously pump blood throughout the body without rest. Therefore, the statement that cardiac muscle tires quickly is false.Rate this question:
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- 39.
Muscle cells can contract and lengthen.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Muscle cells can only contract, not lengthen. When a muscle contracts, the muscle fibers shorten, causing the muscle to pull on the attached bones and create movement. However, muscle cells do not have the ability to actively lengthen on their own. Lengthening of muscles occurs when an opposing muscle group contracts, causing the original muscle to passively stretch. Therefore, the correct answer is False.Rate this question:
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- 40.
While one muscle in a pair contracts, the other muscle in the pair relaxes to its original length.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
This statement is true because muscles work in pairs called antagonistic pairs. When one muscle in the pair contracts, it shortens and pulls on the bone, causing movement. At the same time, the other muscle in the pair relaxes and lengthens to allow for the movement to occur. This coordinated action of contraction and relaxation allows for smooth and controlled movement in the body.Rate this question:
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- 41.
Regular exercise is important for maintaining the strength and flexibility of muscles.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Regular exercise is important for maintaining the strength and flexibility of muscles because when we exercise, our muscles are put under stress and this stimulates the growth of new muscle fibers. Additionally, exercise helps to improve blood circulation, delivering oxygen and nutrients to the muscles, which aids in their repair and recovery. Regular exercise also helps to prevent muscle loss and maintain muscle mass as we age. Therefore, it is important to engage in regular exercise to keep our muscles strong and flexible.Rate this question:
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- 42.
A muscle ________ can occur when muscles are overworked or overstretched.
Correct Answer
Strain, strainExplanation
A muscle strain can occur when muscles are overworked or overstretched. This happens when the muscle fibers are stretched beyond their normal limits, causing small tears in the muscle tissue. Strains can range from mild to severe, depending on the extent of the damage. Symptoms of a muscle strain include pain, swelling, and limited range of motion. Treatment typically involves rest, ice, compression, and elevation (RICE), as well as over-the-counter pain relievers. Severe strains may require medical intervention and physical therapy to aid in the healing process.Rate this question:
- 43.
A skeletal muscle can ________ or contract and stay contracted.
Correct Answer
Cramp, crampExplanation
A skeletal muscle can experience cramp, which refers to a sudden and involuntary contraction of the muscle. Additionally, once a muscle is cramping, it can stay contracted for a certain period of time. This can cause discomfort and pain, and may require stretching or massaging the muscle to relieve the cramp.Rate this question:
- 44.
Inflammation of the tendon is called tendinitis.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Tendinitis refers to the inflammation of a tendon, which is a fibrous tissue that connects muscle to bone. Inflammation can occur due to overuse, injury, or certain medical conditions. Symptoms of tendinitis include pain, swelling, and tenderness in the affected area. Treatment typically involves rest, ice, compression, and elevation (RICE), along with pain medication and physical therapy. Therefore, the statement "Inflammation of the tendon is called tendinitis" is true.Rate this question:
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- 45.
All of the following are parts of the integumentary system EXCEPT:
- A.
Eyes
- B.
Skin
- C.
Hair
- D.
Nails
- E.
Oil glands
- F.
Sweat glands
Correct Answer
A. EyesExplanation
The integumentary system is responsible for protecting the body from external threats and includes the skin, hair, nails, oil glands, and sweat glands. However, the eyes are not part of the integumentary system. The eyes belong to the sensory system and are responsible for vision.Rate this question:
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- 46.
What is the function of the skin?
- A.
Maintaining temperature
- B.
Gathering information
- C.
Eliminating wastes
- D.
Protecting the body
- E.
Producing vitamin D
- F.
All of the above
Correct Answer
F. All of the aboveExplanation
The skin has multiple functions in the body. It helps in maintaining temperature by regulating heat loss through sweat and blood flow. It also acts as a sensory organ, gathering information from the environment through touch, pressure, and temperature receptors. The skin eliminates wastes through sweat and sebum production. It protects the body from harmful substances, UV radiation, and pathogens. Additionally, the skin plays a role in producing vitamin D when exposed to sunlight. Therefore, all of the given options are correct functions of the skin.Rate this question:
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- 47.
The skin prevents disease-causing microorganisms from entering the body.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The skin acts as a protective barrier for the body, preventing disease-causing microorganisms from entering. It serves as a physical barrier that prevents the entry of pathogens, such as bacteria and viruses, into the body. The skin's outer layer, known as the epidermis, is made up of tightly packed cells that provide a tough and waterproof barrier. Additionally, the skin produces antimicrobial substances, such as sweat and sebum, which help to kill or inhibit the growth of microorganisms on the skin's surface. Overall, the skin plays a crucial role in preventing the entry of pathogens and protecting the body from diseases.Rate this question:
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- 48.
________ is a type of protein found in hair, skin, and nails.
Correct Answer
Keratin, keratinExplanation
Keratin is a type of protein that is present in hair, skin, and nails. It provides structural support and strength to these tissues. Keratin is known for its durable and tough nature, making it an essential component for the health and integrity of hair, skin, and nails.Rate this question:
- 49.
Most cells in the epidermis are dead.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
The epidermis is the outermost layer of the skin, and it is composed of multiple layers of cells. The outermost layer of the epidermis, called the stratum corneum, is made up of dead cells that have undergone a process called keratinization. These dead cells serve as a protective barrier for the underlying layers of the skin. Therefore, it is true that most cells in the epidermis are dead.Rate this question:
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- 50.
Cells stay in the epidermis for about ___________________ until they are shed.
- A.
2 to 3 hours
- B.
2 to 3 days
- C.
2 to 3 weeks
- D.
2 to 3 months
Correct Answer
C. 2 to 3 weeksExplanation
The cells stay in the epidermis for about 2 to 3 weeks until they are shed. This means that it takes approximately 2 to 3 weeks for the cells in the outermost layer of the skin to be replaced by new cells.Rate this question:
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