PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following statements correctly describes how muscles avoid being torn apart during use?
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Rope-like muscle is so strong it doesn’t need any other supports.
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Rope-like connective tissue wraps delicate muscle fibers.
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Rope-like muscle tissue is wrapped with connective tissue that holds it together.
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Muscles are easily torn during use despite their strength.
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Explanation:
Detailed explanation-1: -Explanation: Titin prevents sacromeres from pulling apart during muscle stretching and maintains myosin filaments in their proper position.
Detailed explanation-2: -The motion of muscle shortening occurs as myosin heads bind to actin and pull the actin inwards. This action requires energy, which is provided by ATP. Myosin binds to actin at a binding site on the globular actin protein.
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