Question

if a neuron is stimulated causing changes in the membrane potential to the point where voltage - gated na⁺ channels open and begin depolarizing the cell, the neuron is said to have reached ______ multiple choice recruitment tetanus summation threshold

Explanation:

In neurophysiology, the threshold is the membrane potential level at which voltage - gated $Na^+$ channels open, leading to depolarization. Recruitment is about activating more motor units, tetanus is a muscle contraction state, and summation is about adding stimuli effects. So when a neuron's membrane potential reaches the point of opening voltage - gated $Na^+$ channels for depolarization, it's the threshold.

Answer:

threshold