PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Where the sarcolemma is extensively folded and nuclei and mitochondria are abundant
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Neurotransmitter
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Motor End Plate
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Axon
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Acetylcholine
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Explanation:
Detailed explanation-1: -Answer and Explanation: The transverse tubules are the parts of the sarcolemma that fold into the muscle fiber and allow membrane potential to reach all myofibrils inside the cell.
Detailed explanation-2: -The motor end plate possesses junctional folds-folds in the sarcolemma that create a large surface area for the neurotransmitter to bind to receptors. The receptors are actually sodium channels that open to allow the passage of Na+ into the cell when they receive a neurotransmitter signal.
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