Muscle action potentials arise at the synapse between the somatic motor neurons and skeletal muscle fibers, known as the neuromuscular junction. Sarcomere and axon terminal are also involved in this process.
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Step 1: An action potential travels down the axon of a somatic motor neuron to the axon terminal. Show moreā¦
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The action potentials in the skeletal muscle cells and neurons share many similarities. One similarity is that both have a depolarization phase where Na+ ions entering the cells depolarization phase due to Ca2+ ions entering the cells repolarization phase due to K+ ions entering the cells repolarization phase due to excess Na+ ions leaving the cells
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In the neuromuscular junction, the stimulation of the motor neuron ultimately results in the release of the neurotransmitter acetylcholine from the presynaptic neuron into the synapse. The release of acetylcholine into the synapse is dependent on the activation of synaptotagmin, which is required for the fusion of acetylcholine-containing vesicles to the plasma membrane. Next, acetylcholine enters the synapse and binds to and activates the transmitter-gated ion channel on the muscle cell, initiating membrane depolarization and muscle contraction.
Adi S.
Action potentials are transmitted to synaptic terminals by the (a) ganglia (b) axon (c) dendrites (d) cell body (e) nodes
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