Question

(a) Name the structural and functional unit of the nervous system.
(b) Draw a flow chart to show the classification of nervous system into various parts.
(c) What is autonomic nervous system? What is its function?
(d) What is voluntary nervous system? Explain the working of voluntary nervous system with an example.

Answer 1

(a) A neuron is the structural and functional unit of the nervous system.

(b) Classification of the nervous system into various parts:


(c) Autonomic nervous system is the part of nervous system that controls and regulates the functions of internal organs of the body by its own.
Its main function is to control and regulate involuntary body functions like heartbeat, blood flow, breathing and digestion.

(d) Voluntary nervous system is the part of the nervous system that is responsible for carrying motor and sensory information both to and from the central nervous system (CNS). It is associated with voluntary control of body movements through the actions of skeletal muscles. It is also responsible for sensing external stimuli, which helps the body to remain in touch with its surroundings.
For example, when the skin is penetrated by a sharp object like a pin, the pain is detected by the pain receptor. The nerve impulses are generated in the sensory nerves and conducted to the brain. The brain sends instructions to the skeletal muscles (effector muscle) through the motor nerves to remove the pin. Then the muscle acts accordingly and removes the pin.