Which statement is incorrect?
A)Inhibitory synapses cause postsynaptic hyperpolarization.
B)An inhibitory synapse may result in postsynaptic sodium channel opening.
C)An inhibitory synapse may result in increased postsynaptic potassium efflux.
D)An excitatory synapse causes depolarization of postsynaptic membranes.
E)An excitatory synapse increases sodium permeability.

Question

Quizplus · Accepted Answer

Inhibitory synapses typically result in hyperpolarization of the postsynaptic membrane, making it less likely to generate an action potential. This is often achieved through the opening of potassium channels, allowing for an efflux of positively charged ions, or the opening of chloride channels, allowing for an influx of negatively charged ions. In contrast, excitatory synapses typically result in depolarization of the postsynaptic membrane, making it more likely to generate an action potential. This is often achieved through the opening of sodium channels, allowing for an influx of positively charged ions. Therefore, statement B is incorrect because inhibitory synapses do not result in sodium channel opening.

Which Statement Is Incorrect