Question

Why do impulse flow only in one direction in reflex arc..

Answer 1

1.An action potential can only depolarise the membrane “in front” as the membrane “behind” is in its refractory period and cannot be depolarised, so the impulse travels in one direction only.

2.The synapse acts as a valve and only allows one way flow due to the neurotransmitter being formed on one side of the synapse and the receptors only being on the other side.