What happens to an action potential at an excitatory synapse
A)The postsynaptic neuron depolarizes the presynaptic cell membrane.
B)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to both Na⁺ and K⁺.
C)The presynaptic neuron increases the permeability of the subsynaptic membrane of the postsynaptic cell to K⁺ only.
D)A small hyperpolarization occurs.

Question

Quizplus · Accepted Answer

At an excitatory synapse, the presynaptic neuron releases neurotransmitters, such as glutamate, which bind to receptors on the subsynaptic membrane of the postsynaptic neuron. This binding causes an increase in permeability of the subsynaptic membrane to both Na⁺ and K⁺, leading to depolarization of the postsynaptic neuron and the generation of an action potential.

What Happens to an Action Potential at an Excitatory Synapse