An ion is a(n)
A) nerve cell.
B) layer of fatty tissue that insulates axons and speeds their impulses.
C) cell that provides nutrients.
D) electrically charged atom.

Question

Quizplus · Accepted Answer

An ion is an electrically charged atom, which means that it has gained or lost one or more electrons, resulting in a net positive or negative charge. Ions play an important role in a variety of biological processes, including nerve impulses, muscle contractions, and the transport of nutrients across cell membranes.

An Ion Is A(n)