Which of the following is not one of the major functions of muscles?
Movement
Protection
Heat production
Posture
The Correct Answer is B
A. Movement: This is a primary function; skeletal muscles move the skeleton, and smooth muscles move substances through organs.
B. Protection: While muscles provide some padding, protection is considered a primary function of the skeletal system (rib cage, skull) and integumentary system (skin).
C. Heat production: Muscles produce a significant amount of heat as a byproduct of contraction (thermogenesis), which is vital for maintaining body temperature.
D. Posture: Skeletal muscles maintain partial contraction (tonus) to keep the body upright and stable.
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Related Questions
Correct Answer is C
Explanation
A. filtration: This is a passive process where water and solutes are forced through a membrane by hydrostatic pressure.
B. osmosis: This is the passive diffusion of water.
C. endocytosis: This is a form of active transport (vesicular transport) that requires ATP to engulf substances into the cell.
D. dialysis: This is the passive diffusion of solutes across a selectively permeable membrane.
Correct Answer is D
Explanation
A. Environment: Factors like pollution, climate, or radiation exposure are known risk factors for various diseases.
B. Stress: Chronic stress weakens the immune system and contributes to cardiovascular and mental health issues.
C. Lifestyle: Choices regarding diet, exercise, and tobacco use directly impact the risk of developing chronic illnesses.
D. All of the above: Since environment, stress, and lifestyle are all recognized as significant risk factors for disease, "All of the above" is correct.
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