Which of the Following Occurs at an Excitatory Synapse

Which of the following occurs at an excitatory synapse?

A) There is increased permeability of the subsynaptic membrane to both Na⁺ and K⁺.
B) A small hyperpolarization occurs.
C) An action potential in the presynaptic neuron always causes an action potential in the postsynaptic neuron.
D) Presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.

Correct Answer:

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