PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ions that help in initiating muscle contraction are
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Magnesium ions
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Sodium ions
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Potassium ions
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Calcium ions
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Explanation:
Detailed explanation-1: -Both calcium & magnesium are required for muscle contraction. Calcium binds to troponin which exposes the active sites on actin. Now myosin head can bind the active sites on actin, initiating the process of muscle contraction.
Detailed explanation-2: -The correct answer: The role of calcium ions in muscle contraction is to C) bind to regulatory sites on troponin, changing the configuration. The importance of calcium ions is there in the muscle contraction because it acts as the ion which helps in the movement of the troponin.
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