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

The correct sequence of events during an action potential starts with polarization, where the neuron is at its resting potential. Upon stimulation, depolarization occurs as sodium ions enter the cell, followed by repolarization where potassium ions exit the cell to restore the negative internal environment. Finally, the neuron returns to its resting potential.