In order to produce a depolarization or hyperpolarization of the postsynaptic membrane, neurotransmitters
A) diffuse widely in the brain to exert changes in metabolism.
B) act through ionotropic receptors to activate a second-messenger.
C) are released into the synapse from the cisternae.
D) open ion channels in the postsynaptic membrane.
E) alter ion channel activity for minutes.

Question

Quizplus · Accepted Answer

Neurotransmitters open ion channels in the postsynaptic membrane, allowing ions to flow into or out of the cell and producing a depolarization or hyperpolarization of the membrane. This change in membrane potential can lead to the initiation of an action potential or inhibition of further signal transmission. Option A and B refer to other methods of neuronal communication and Option C is an incorrect description of the location of neurotransmitter release. Option E is also incorrect as neurotransmitter effects are typically rapid and do not last for minutes.

In Order to Produce a Depolarization or Hyperpolarization of the Postsynaptic