Question

During refractory period

• A. Nerve transmits impulse very slowly
• B. Nerve can not transmit impulse
• C. Nerve transmits impulses very rapidly
• D. None of the above

Answer 1

The correct option is B Nerve can not transmit impulse

In neurons, the absolute refractory period is caused by the inactivation of the $N{a}^{+}$ channels, that originally opened to depolarize the membrane. These channels remain inactivated until the membrane hyperpolarizes. The channels then close, de-inactivate, and regain their ability to open in response to stimulus. Hence, during this time the nerve can not transmit impulse.