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Which of the following results from the release of the neurotransmitter dopamine into the nerve synapse?

The presynaptic neuron fires an action potential.

Dopamine binds to receptor proteins on the membrane of the postsynaptic cell.

Dopamine enters the cytoplasm of the postsynaptic cell.

Dopamine causes the postsynaptic nerve cell to contract.

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Calcium enters the axon terminal during an action potential, causing release of the neurotransmitter into the synaptic cleft. After its release, the transmitter binds to and activates a receptor in the postsynaptic membrane. Deactivation of the neurotransmitter.