PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What starts a muscle contraction?
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Release of Calcium Ions
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Attachment of Myosin-Heads
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An Action Potential
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Release of ADP
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Explanation:
Detailed explanation-1: -The action potential invades T-tubules and causes the L-type calcium channels to open, which in turn causes ryanodine receptors (RyRs) in the SR to open and release calcium, which stimulates contraction.
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