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Events of Synaptic Transmission in Order:

a) Neurotransmitter release, Receptor binding, Action potential
b) Action potential, Neurotransmitter release, Receptor binding
c) Receptor binding, Action potential, Neurotransmitter release
d) Neurotransmitter release, Action potential, Receptor binding

1 Answer

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Final answer:

The correct sequence for the events of synaptic transmission is an b) action potential initiating the release of neurotransmitters, which then bind to receptors on the neighboring neuron.

Step-by-step explanation:

The correct order of events during synaptic transmission is Action potential, Neurotransmitter release, and Receptor binding. When an action potential arrives at the axon terminals, it triggers the opening of voltage-gated Ca2+ channels. The influx of Ca2+ ions causes synaptic vesicles to merge with the presynaptic membrane, releasing neurotransmitters into the synaptic cleft. These neurotransmitters then travel across the synapse and bind to receptors on the dendrites of the adjacent neuron (often resulting in a new action potential if the signal is strong enough). This sequential process ensures the transfer of the nerve impulse from one neuron to another or to another type of cell, such as a muscle cell. Therefore, the correct sequence is: b) Action potential, Neurotransmitter release, and Receptor binding.

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