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Home Q & A Board Biology-Related Homework Help Cell Biology
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nite_n_day nite_n_day
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10 years ago
Describe the basic sequence of events that occurs as an action potential arrives at the neuromuscular junction and is transmitted to the muscle cell.
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Eric Clapton
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10 years ago
"Acetylcholine released by the motor neuron at the neuromuscular junction changes the permeability of the cell membrane at the motor end plate. The permeability change allows the influx of positive charge, which triggers an action potential. The action potential spreads across the entire surface of the muscle fiber and into the interior via T tubules. The cytoplasmic concentration of calcium ions (released from the sarcoplasmic reticulum) increases, triggering the start of a contraction. The contraction ends when AChE removes the ACh from the synaptic cleft and motor end plate."
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robertlingrobertling
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nite_n_day Author
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10 years ago
Thanks both of you, respects.
Would you know my name, if I saw you in heaven?

Eric Clapton
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