Question

The processes that occur during repolarisation of nerve fibres are
(i) Open N$a^{+}$ channels
(ii) Closed N$a^{+}$ channels
(iii) Closed $K^{+}$ channels
(iv) Open $K^{+}$ channels

• A. (ii) and (iii)
• B. (i) and (ii)
• C. (ii) and (iv)
• D. (i) and (iii)

Answer 1

The correct option is C (ii) and (iv)

• Repolarization is the shift of charge of the inner side of the membrane from positive to negative by the closing movement of $N{a}^{+}$ and $K^{+}$ influx in the cell. So, the correct answer is option (C)