Excitatory signals to a neuron must exceed inhibitory signals by a minimum intensity in order to trigger
A) reuptake.
B) a refractory period.
C) an action potential.
D) selective permeability.

Question

Quizplus · Accepted Answer

Excitatory signals are graded potentials that occur on the dendrites of a neuron. These potentials can either depolarize or hyperpolarize the neuron. If the sum of excitatory signals is greater than the sum of inhibitory signals, this will result in the neuron reaching the threshold potential, and will trigger an action potential. Therefore, the correct answer is (C) an action potential.

Excitatory Signals to a Neuron Must Exceed Inhibitory Signals by a Minimum