Question

Refer the figure to answer the question. Identify the region where all $N{a}^{+}$ channels are reactivated, but closed and all $K^{+}$ channels are closed.

• A. D
• B. C
• C. B
• D. A

Answer 1

The correct option is B C

In the given figure the polarisation depolarisation and repolarisation curve is shown.

From the figure, it is clear that point (C) or repolarisation is the state where all the $N{a}^{+}$ channels are reactivated but closed and all $K^{+}$ channel are closed.