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Transcript:
Neuromuscular Junction Function
When an action potential, or nerve impulse, reaches the axon terminal, the cell depolarizes, calcium gates open, and calcium ions flow into the terminal. These calcium ions cause vesicles in the axon terminal to join to the cell membrane. Once the vesicles attach to the cell membrane, pores form in the membrane and neurotransmitters diffuse, or move across the synapse to receptors on the membrane of the neighboring neuron or muscle fiber.
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