Question

Match the terms of column (A) with those of column (B).

	Column (A)		Column (B)
A	Olfactory receptors	1	Tongue
B	Thermo receptors	2	Eye
C	Gustatory receptors	3	Nose
D	Photoreceptors	4	Skin

• A. A- 3, B- 4, C- 1, D- 2
• B. A- 4, B- 3, C- 1, D- 2
• C. A- 2, B- 1, C- 3, D- 4
• D. A- 1, B- 2, C- 3, D- 4

Answer 1

The correct option is A A- 3, B- 4, C- 1, D- 2

Sensory receptors are nerve receptors that are present in different organs of a body that respond to stimulus in the internal or the external environment of an organism. Olfactory receptors, thermoreceptors, gustatory receptors, photoreceptors are sensory receptors.

Olfactory receptors also called odorant receptors are present in the nose. They transmit odours from nose to brain and helps recognise different types of smell.

Thermoreceptors are non-specialised sensory neurons which connect the skin to the hypothalamic region of the brain. These nerves, code for temperature changes which are detected by the brain. Further, required thermoregulation is processed by the hypothalamus.

Gustatory receptors also called taste receptors are present in the tongue. They detect five types of taste, viz; sweet, sour, bitter, salty and savoury.

Photoreceptors are present in eyes. There are two types of photoreceptors, i.e, rods and cones. They contain coloured pigments which help differentiate between colours. So, the correct answer is option A.