NEET PG DENTAL EXAM

Detailed explanation-1: -During hyperpolarization, voltage-gated sodium channels begin to reactivate after being closed and allow some positive sodium ions into the cell. This stage is referred to as the relative refractory period because the production of an action potential is possible only if a stronger stimulus is present.

Detailed explanation-2: -The relative refractory period is the interval of time during which a second action potential can be initiated, but initiation will require a greater stimulus than before. Refractory periods are caused by the inactivation gate of the Na+ channel.

Detailed explanation-3: -The period during which a stronger than normal stimulus is needed in order to elicit an action potential is referred to as the relative refractory period (RRP).

Detailed explanation-4: -During the absolute refractory period, no more action potentials can be sent. During the relative refractory period the voltage gated potassium channels are open, causing the membrane to become more negative, called hyperpolarization. This causes a greater stimulus to depolarize the cell to threshold.