Question

Voltage-gated Na channels exist in three distinct conformations in axons because Answers A-D A they assume an inactivated conformation shortly after opening, which ensures that the action potential cannot move backwards toward the cell body. B they change conformation when binding Nat and transporting it to the opposite side of the membrane before releasing it outside the cell. C they respond to ligand binding, mechanical stress, or changes in voltage. D they assume different conformations as ATP is bound and hydrolyzed during ion movement. o

Answer 1

Answer

A) They assume an inactivated conformation shortly after opening, which ensures that action potential can not move in backwards towards the cell body.

Explanation : voltage gated Na+ channels assume inactivated conformation to ensure unidirectional flow of ions in forward direction and to prevent the action potential to move in backward direction.