When a neurotransmitter like GABA is acting in an inhibitory manner which of the following is likely a result of the GABA acting on the postsynaptic cell?
A) opening of chemically gated sodium channels
B) hyperpolarization of the postsynaptic cell membrane
C) depolarization of the postsynaptic cell membrane
D) influx of positively charged ions into the postsynaptic cell

Question

Quizplus · Accepted Answer

When GABA acts in an inhibitory manner, it typically causes the opening of chemically gated chloride channels in the postsynaptic cell membrane. This results in an influx of chloride ions into the cell, which causes hyperpolarization and makes it more difficult for the cell to fire an action potential. Therefore, option B is the best answer choice as it correctly states that GABA causes hyperpolarization of the postsynaptic cell membrane.

When a Neurotransmitter Like GABA Is Acting in an Inhibitory