The Following Steps Refer to Various Stages in Transmission at a Chemical

question 22

Multiple Choice

The following steps refer to various stages in transmission at a chemical synapse.
1) Neurotransmitters bind with receptors associated with the postsynaptic membrane.
2) Calcium ions rush into the neuron's cytoplasm.
3) An action potential depolarizes the membrane of the axon terminal.
4) The ligand-gated ion channels open.
5) The synaptic vesicles release neurotransmitters into the synaptic cleft.
Which sequence of events is correct?

• A)1 → 2 → 3 → 4 → 5
• B)2 → 3 → 5 → 4 → 1
• C)3 → 2 → 5 → 1 → 4
• D)4 → 3 → 1 → 2 → 5
• E)5 → 1 → 2 → 4 → 3

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