When a neurotransmitter binds to its receptor and increases the permeability of the postsynaptic membrane to Na⁺, A) the membrane will be hyperpolarized. B) more Cl⁻ will also diffuse into the cell. C) an excitatory postsynaptic potential (EPSP) will result. D) the membrane will become impermeable to K⁺. E) Na⁺ diffuses out of the cell.

Question

Quizplus · Accepted Answer

When a neurotransmitter increases the permeability of the postsynaptic membrane to Na+, it causes an influx of Na+ ions into the cell, leading to depolarization of the membrane. This depolarization is known as an excitatory postsynaptic potential (EPSP), making the neuron more likely to fire an action potential.

When a Neurotransmitter Binds to Its Receptor and Increases the Permeability