MUSCLE
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Within the axonal endings are many small vesicles containing a neurotransmitter substance called ____
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acetylcholine
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isotonic contraction
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fatigue
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isometric contraction
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Explanation:
Detailed explanation-1: -Acetylcholine is released by the axonal ending, diffuses to the muscle cell, and attaches to the ACh receptors on the sarcolemma. The calcium concentration at the myofilaments increas; the myofilaments slide past one another, and the cell shortens. The muscle cell relaxes and lengthens.
Detailed explanation-2: -Synaptic vesicles (SVs) are small, electron-lucent vesicles that are clustered at presynaptic terminals. They store neurotransmitters and release them by calcium-triggered exocytosis.
There is 1 question to complete.