At an excitatory synapse, an action potential in the presynaptic neuron increases
A)the membrane potential of the postsynaptic cell membrane
B)the permeability of the postsynaptic cell to Na+
C)the permeability of the postsynaptic cell to Cl-
D)the presynaptic neuron's membrane potential
E)all of the above

Question

Quizplus · Accepted Answer

An action potential in the presynaptic neuron causes the release of neurotransmitters into the synaptic cleft, which can bind to and activate receptors on the postsynaptic neuron. At an excitatory synapse, the neurotransmitters result in an increase in the postsynaptic neuron's permeability to sodium ions, causing depolarization and potentially leading to an action potential in the postsynaptic neuron. The other choices listed are not directly affected by an action potential at an excitatory synapse.

At an Excitatory Synapse, an Action Potential in the Presynaptic