Q2. Compare the following:
(b) Resting potential and action potential
Resting Potential |
Action Potential |
1. It is the potential difference (difference in electric charge) across the membrane when the neuron is at the resting phase. |
1. It is the potential difference (difference in the electric charge) across the membrane when the neuron is stimulated or excited. |
2. The outer side of the neuron is positively charged and the interior of the neuron is negatively charged. |
2. The outer side of the neuron is negatively charged and the interior of the neuron is positively charged. |
3. The plasma membrane of the neuron is more permeable to K+ ions. |
3. The plasma membrane of the neuron is more permeable to Na+ ions. |
4. The sodium-potassium-ATPase pump is active and sends Na+ ions outside the neuron to maintain the resting potential. |
4. The sodium-potassium-ATPase pump functions in a reverse manner and sends Na+ ions into the neuron. |