PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Where is calcium stored in the muscle cell?
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T Tubules
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Sarcoplasmic Reticulum (SR)
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Sarcolemma
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Sarcomere
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Explanation:
Detailed explanation-1: -Calcium ions at rest are stored in the sarcoplasmic reticulum (SR) from which they are rapidly released upon the depolarisation of the sarcolemmal and transverse (T-) tubular membranes of the muscle cell.
Detailed explanation-2: -The sarcoplasmic reticulum (SR) is a form of smooth muscle endoplasmic reticulum (ER) found in skeletal muscle that functions as a regulator of Ca2+ storage and release homeostasis during and after muscle contraction [51].
Detailed explanation-3: -Skeletal muscle function is governed by an action potential that releases calcium stored in the sarcoplasmic reticulum.
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