Question

What is meant by nerve impulse?

Answer 1

Nerve impulses r the messages sent by receptors through nerve fibre from receptors to central nervous system lyk spinal cord or nd brain.....or the instruction sent from central nervous system to effectors

Answer 2

Answer:

The nerve impulse is a wave of depolarization traveling along the axon of the motor nerve such that the resting membrane potential of about −70 millivolt is reversed, becoming briefly positive. At the nerve terminal, the nerve impulse causes voltage-gated calcium channels at the active zones