Question

Action potential of a nerve cells is created by

• A. Ca
• B. K
• C. Na
• D. Cl

Answer 1

Answer: (C)

Na

An action potential (AP) is the mode through which a neuron transports electrical signals. Action potentials are caused when different ions cross the neuron membrane. A stimulus first causes sodium channels to open. Because there are many more sodium ions on the outside, and the inside of the neuron is negative relative to the outside, and the sodium ions rush into the neuron.

So, the correct option is C.