PATHOLOGY

PATHOLOGY MCQ

SKIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What evaporates on the skin to help cool down the body?
A
Sweat
B
Oil
C
Melanin
D
Blood
Explanation: 

Detailed explanation-1: -That’s because cooling your body via sweating relies on a principle of physics called “heat of vaporization.” It takes energy to evaporate sweat off of your skin, and that energy is heat. As your excess body heat is used to convert beads of sweat into vapor, you start to cool down.

Detailed explanation-2: -Take a Cool Shower A bath or even a simple sponging off with cold water will work, too. It should help cool your body. And warm water also works because you cool down as the water evaporates from your skin and hair.

Detailed explanation-3: -perspiration, in most mammals, water given off by the intact skin, either as vapour by simple evaporation from the epidermis (insensible perspiration) or as sweat, a form of cooling in which liquid actively secreted from sweat glands evaporates from the body surface.

Detailed explanation-4: -Sweat, which consists of 90 percent water, starts to evaporate. The necessary heat of evaporation is extracted from the sweat itself, which leads to a heat transfer from the liquid into the gaseous state.

There is 1 question to complete.