PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In relaxation of the muscle Ca2+ detaches from troponin
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true
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false
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -This is done by binding to another structure, named troponin, inside the heart muscle cell. During relaxation, calcium has to be detached from troponin and expelled out of the cell or stored back inside the sarcoplasmic reticulum.
Detailed explanation-2: -Troponin and tropomyosin are indispensable for the physiological regulation of striated muscle contraction. The reason why troponin is essential is straightforward to understand, because it binds calcium ions19) and changes its structure with Ca2+.
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