PHYSIOLOGY
SKELETAL MUSCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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sarcoplasmic reticulum
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sarcolemma
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troponin
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myosin heads
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Detailed explanation-1: -The ACh then binds to its receptors (ligand-gated cation channels) present on the surface of the sarcolemma (membrane of the post-synaptic muscle cell). This binding causes the opening of ligand-gated sodium ion (cation) channels which results in the influx of sodium ions into the muscle cell.
Detailed explanation-2: -The “motor end plate” part of the sarcolemma contains acetylcholine (ACh) receptors. This motor end plate (or end plate) is formed where the motor neuron meets the muscle fiber, therefore, it is a synapse that allows AP transmission.
Detailed explanation-3: -Acetylcholine binds to receptors on the sarcolemma. Sodium, potassium, and other cations begin to flow across the cell membrane, generating an action potential within the muscle fiber. The muscle contracts.