PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The energy needed to perform a muscle contraction comes directly from
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ATP
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Oxygen
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Glucose
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Calcium
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Explanation:
Detailed explanation-1: -ATP enables the actin-myosin cross-bridge to detach, and release energy through its hydrolysis to enable the myosin head to return to its normal position.
Detailed explanation-2: -Adenosine triphosphate (ATP) is the sole fuel for muscle contraction. During near maximal intense exercise the muscle store of ATP will be depleted in < 1s, therefore, to maintain normal contractile function ATP must be continually resynthesized.
Detailed explanation-3: -The energy is derived from adenosine triphosphate (ATP) present in muscles. Muscles tend to contain only limited quantities of ATP. When depleted, ATP needs to be resynthesized from other sources, namely creatine phosphate (CP) and muscle glycogen.
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