The binding of a neurotransmitter to inhibitory synapses increases the permeability of the subsynaptic membrane to ____.
A)sodium or chloride
B)potassium or calcium
C)potassium or chloride
D)potassium or sodium
E)calcium or chloride

Question

The binding of a neurotransmitter to inhibitory synapses increases the permeability of the subsynaptic membrane to ____.
A)​sodium or chloride
B)potassium or calcium
C)potassium or chloride
D)potassium or sodium
E)​calcium or chloride

Quizplus · Accepted Answer

Inhibitory synapses typically use GABA (gamma-aminobutyric acid) as their neurotransmitter, which opens up channels permeable to chloride ions (Cl-). When chloride channels open upon GABA binding, Cl- enters the subsynaptic area, hyperpolarizing the membrane and making it less likely for an action potential to occur. Therefore, the correct choice is potassium or chloride.

The Binding of a Neurotransmitter to Inhibitory Synapses Increases the Permeability