An inhibitory postsynaptic potential (IPSP) occurs in a membrane made more permeable to
A) potassium ions.
B) sodium ions.
C) calcium ions.
D) ATP.

Question

Quizplus · Accepted Answer

An inhibitory postsynaptic potential (IPSP) occurs when the neuron becomes more negative or hyperpolarized, making it less likely to fire an action potential. This is often caused by the opening of ion channels that allow negatively charged ions to enter the cell or positively charged ions to leave the cell. In the case of an IPSP, the ion channels that open most commonly allow potassium ions to leave the cell, making the inside more negative. Therefore, choice A is the correct answer.

An Inhibitory Postsynaptic Potential (IPSP) Occurs in a Membrane Made