PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which structure stores Ca2+
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sarcolemma
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sarcoplasmic reticulum
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myofibril
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sarcomere
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Explanation:
Detailed explanation-1: -The sarcoplasmic reticulum of skeletal muscle cells is a highly ordered structure consisting of an intricate network of tubules and cisternae specialized for regulating Ca2+ homeostasis in the context of muscle contraction.
Detailed explanation-2: -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-3: -The SR of skeletal muscle cells is a highly organized intracellular membrane system that stores and releases Ca2+ in a highly regulated fashion.
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