PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Calcium ions are released from the ____
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Sarcoplasmic Reticulum
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Sarcoplasm
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Sarcolemma
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Sarcasm
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Explanation:
Detailed explanation-1: -When the muscle is stimulated, calcium ions are released from its store inside the sarcoplasm ic reticulum, into the sarcoplasm (muscle ). Invaginations of the plasma membrane (sarcolemma) of the muscle fibres are called T (or transverse) tubules .
Detailed explanation-2: -During muscle contraction, Ca2+ is released from the sarcoplasmic reticulum (SR) into the cytosol through the ryanodine receptor (RyR). Countercurrent is necessary to balance the charge moved during RyR-mediated Ca2+ release.
Detailed explanation-3: -The sarcoplasmic reticulum releases calcium ions during muscle contraction and absorb them during relaxation.
There is 1 question to complete.