Question

Inhibitory neurotransmitters such as glycine and GABA make a postsynaptic

cell harder to depolarize by:
A. allowing an influx of Na+.
B. allowing Na+ to escape.
C. allowing an influx of Cl-.
D. allowing an influx of K+.

Answer 1

Inhibitory neurotransmitters such as glycine and GABA make a postsynaptic cell harder to depolarize by allowing an influx of Cl-. This hyperpolarization makes the neuron less likely to fire an action potential. Hence the correct answer is option C

Step-by-step explanation:

Inhibitory neurotransmitters such as glycine and GABA make a postsynaptic cell harder to depolarize by allowing an influx of Cl-. When GABA is released from a presynaptic neuron, it binds to and opens Cl- channels, causing Cl- ions to enter the cell and hyperpolarize the membrane. This hyperpolarization makes the neuron less likely to fire an action potential.

Hence the correct answer is option C