Question

Which area of the body is most sensitive to the sensation of cold?
A. Forehead
B. Cheeks
C. Chest
D. Hand

Answer 1

Hint: Thermoreceptors perceive the sensation of hot or cold. There are separate receptors for warmth and cold. These receptors are located in the dermis and epidermis of the skin.

Complete step by step answer:
To solve the question we must know about the thermoreceptors.
Thermal sensation is associated with the stimulation of localised sensory spots in the skin. The thermoreceptors recognise the thermal sensation. Thermoreceptors are of two types’ warmth and cold receptors. Warmth receptors are excited by rise in temperature whereas cold receptors respond due to fall in temperature. Our body has more cold receptors as compared to warmth receptors. The nerve endings of sensory neurons respond preferentially to cooling are mostly found in skin. They also occur in the tongue, cornea, bladder and facial skin. Cold receptors are found in the chest, chin, nose, fingers, and forehead.
Forehead is the most sensitive to cold sensation as it contains the maximum number of cold receptors. Cold receptors are found maximum in the dermis of the skin like forehead, nose, and ear.
Cheeks- Pains receptors are mostly found in cheeks.
Chest- Cold receptors are found in the chest but the numbers of receptors are less as compared to the forehead.
Hand- Warmth receptors are more in number in the hands.

Thus the correct answer is A. Forehead has maximum cold receptors.

Note:
Heat receptors are found on the skin surface or the epidermis whereas cold receptors are found on the dermis. Thus heat receptors respond more strongly than the cold receptors. For example we can hold a cold cup for some time but we cannot hold a hot cup for even seconds.