Question

(a) What are the various sense organs in our body?

(b) What is meant by receptors and effectors ? Give two examples of each.

Answer 1

(a) There are five sense organs in our body. They are the eyes, the ears, the nose, the tongue and the skin.

(b) A receptor is a cell present in the sense organs that are sensitive to specific stimuli.
Example: The eyes have light receptors which can detect light and the ears have sound receptors which can detect sound.

An effector is a part of the body which can respond to a stimulus according to the instructions given by the nervous system.
Example: Muscles and glands of the human body.