Question

Assertion :Imbalance in N$a^{+}$, $K^{+}$ and proteins generates the resting potential. Reason: To maintain in equal distribution of N$a^{+}$ and $K^{+}$, neurons use electrical energy

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Both Assertion and Reason are incorrect

Answer 1

The correct option is C Assertion is correct but Reason is incorrect

• Resting potential is the potential difference across the nerve fiber when there is no conduction of nerve impulses. At rest, there is a high concentration of $K^{+}$ and proteins inside while there is a high $N{a}^{+}$ concentration outside. This creates a negative charge inside and a positive charge outside.
• The unequal distribution of $N{a}^{+}$ and $K^{+}$ is maintained by utilizing chemical energy in the form of ATP. It involves the operation of $N{a}^{+}$-$K^{+}$ pump which is present in the plasma membrane. This pump uses ATP to pump sodium out of cells while pumping potassium into cells, both against their concentration gradients.

Thus the correct answer is option C.