Question

Question 34:
(a) Name the three types of nerves which constitute the peripheral nervous system.
(b) What is the difference between a reflex action and walking ?
(c) How do we detect the smell of an incense stick (agarbatti) ?

Lakhmir Singh Biology Class 10

Answer 1

Hey friend,
Here is your answer:

(a) The three types of nerves that constitute the peripheral nervous system are:
• Cranial nerves - carry impulses to and from the brain.
• Spinal nerves - carry impulses to and from the spinal cord.
• Autonomic nerves - controls the unconscious internal actions of the body.

(b) A reflex action is a spontaneous, autonomic and mechanical response to a stimulus controlled by the spinal cord. While, walking is a voluntary action that is under our control that is we can walk whenever we want to.

(c) We can detect the smell of an incense stick (agarbatti) as the olfactory receptors present in the lining of the nose, detect the smell produced.

Hope it helps u.

Answer 2

a) There are three types of nerves in your body: autonomic nerves, motor nerves, and sensory nerves.

b) A reflex action is an involuntary action which is a rapid and automatic response to stimuli. Walking is a voluntary action, which requires our thinking and is within our control.

c) Smell of agarbatti is detected by olfactory receptors in the temporal lobe of fore-brain. It is first received by olfactory receptors in our nose.