The ion that plays a key role in initiating electrical signals in neurons is
A) K⁺.
B) Na⁺.
C) Cl⁻.
D) Ca²⁺.

Question

Quizplus · Accepted Answer

When a neuron receives a signal, Na⁺ channels on its cell membrane open, allowing Na⁺ ions to rush into the cell, creating a depolarization that initiates an electrical signal. This signal can then be transmitted along the neuron and to adjacent neurons. Therefore, Na⁺ plays a key role in initiating electrical signals in neurons.

The Ion That Plays a Key Role in Initiating Electrical