Question

Arrange the following steps of the action potential mechanism in the correct order: 
(1) Depolarization 
(2) Repolarization 
(3) Polarization 
(4) Resting Potential 

Choose the correct options from the given below:

• A. 1, 3, 2, 4
• B. 1, 2, 3, 4
• C. 4, 3, 2, 1
• D. 3, 1, 2, 4

Hint:

Understanding the order of action potential phases is essential for comprehending how neurons transmit electrical signals.

Answer 1

The Correct Option is D

An action potential unfolds as follows: initially, the neuron is polarized at its resting potential. Stimulation triggers depolarization with sodium ion influx, then repolarization via potassium ion efflux restores the negative intracellular state. Lastly, the neuron reattains its resting potential.