What action produces an IPSP on the postsynaptic membrane? A)influx of Na+ ions B)opening of Ca²⁺ channels into the neuron C)outflow of K+ ions D)opening of Cl^- channels into the neuron

Question

Quizplus · Accepted Answer

An IPSP (inhibitory postsynaptic potential) is a change in membrane potential that is below the resting threshold and makes an action potential less likely to occur. This is achieved by the opening of channels that allow the influx of negatively charged ions or outflow of positively charged ions, leading to hyperpolarization of the postsynaptic membrane. The most common channels that produce IPSPs are Cl- channels, which allow the influx of negatively charged chloride ions into the neuron or outflow of positively charged ions, making the inside of the cell more negative. Therefore, the correct choice is D, which describes the opening of Cl- channels into the neuron.

What Action Produces an IPSP on the Postsynaptic Membrane