An EPSP is conducted decrementally to the axon hillock,where voltage-gated Na+ and K+ channels are opened to created an action potential in the first segment of the axon.

Question

Quizplus · Accepted Answer

EPSPs (excitatory postsynaptic potentials) are graded potentials that can summate to depolarize the neuron to its threshold for firing an action potential. If the EPSP reaches the axon hillock and is strong enough, it will trigger the opening of voltage-gated Na+ channels and lead to an action potential that propagates down the axon. This process is not decremental (meaning it does not weaken with distance), but rather all-or-none. Therefore, the correct answer is A.

An EPSP Is Conducted Decrementally to the Axon Hillock,where Voltage-Gated