An IPSP is inhibitory because it

A) changes the threshold of the neuron.
B) hyperpolarizes the postsynaptic membrane.
C) prevents Ca²⁺ entry into the presynaptic terminal.
D) reduces the amount of neurotransmitter released by the presynaptic terminal.
E) depolarizes the postsynaptic membrane.

IPSP

Inhibitory postsynaptic potential; a synaptic potential that makes a postsynaptic neuron less likely to generate an action potential.

Hyperpolarizes

The process of increasing the negative charge within a neuron beyond its resting potential, making it less likely to fire an action potential.

Presynaptic Terminal

The end point of a neuron that conducts electrical signals and releases neurotransmitters to communicate with a neighboring neuron at a synapse.