PHYSIOLOGY
MUSCLE CONTRACTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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True or False:An action potential travels down the muscle cell and triggers acetylcholine to be released and bind to its receptors on the neuron.
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True
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False
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -When an action potential reaches a neuromuscular junction, it causes acetylcholine to be released into this synapse. The acetylcholine binds to the nicotinic receptors concentrated on the motor end plate, a specialized area of the muscle fibre’s post-synaptic membrane.
Detailed explanation-2: -Acetylcholine Is Released and Binds to Receptors on the Muscle Membrane. A multistep molecular process within the muscle fiber begins when acetylcholine binds to receptors on the muscle fiber membrane.
Detailed explanation-3: -So, the correct answer ‘Acetylcholine is released from the axon of the motor neuron, diffuses across the synapse and binds to receptors on the muscle cell, leading to contraction.
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