Question

question: a nerve ____ is a signal that triggers an electrical change in the cell.

Explanation:

In the context of biology (a subfield of Natural Science), a nerve impulse (or action potential) is the signal that triggers an electrical change in the nerve cell. The term "impulse" fits here as it refers to the electrical signal that travels along a nerve fiber, causing the electrical change (depolarization, etc.) in the cell membrane of the neuron.

Answer:

impulse