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)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.

Question

Quizplus · Accepted Answer

At an excitatory synapse, there is increased permeability of the subsynaptic membrane to both Na⁺ and K⁺, which leads to depolarization of the postsynaptic neuron. This can lead to the generation of an action potential if the depolarization is strong enough.

Which of the Following Occurs at an Excitatory Synapse