A) physical phenomenon
B) chemical phenomenon
C) physico - chemical phenomenon
D) mechanical phenomenon.
Correct Answer: B
Solution :
: The nerve impulse is an electrical occurrence that travels down a neuron. This electrical signal transmits commands from the brain to the motor nerves, and carries sensory messages from sensory nerves (skin, ears, nose, eyes, taste buds) to the brain. The transmission of nerve impulses from neuron to neuron is performed by neurotransmitters. Nerve impulses are relayed from the nerve endings through synapses. The conduction of impulse is an active self- propagating process that moves along the nerve at a constant amplitude and velocity. Its characteristic series of potential changes is known as action potential. Action potential is generated through the influx of sodium ions causing depolarization of the membrane and this propagate in forward direction.
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