AP BIOLOGY

Detailed explanation-1: -A student is outside on a very hot day. How does perspiration help maintain his or her body heat? It prevents heat from entering his body. It causes evaporation and carries away body heat.

Detailed explanation-2: -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-3: -It happens due to evaporative cooling. The sweat gets vaporized from the skin into the atmosphere, by absorbing heat from the body. Thus the body cools down as it loses heat. Was this answer helpful?

Detailed explanation-4: -The body water has an important role as a thermoregulator, regulating the overall body temperature by helping dissipate heat. If the body becomes too hot, water is lost through sweat and the evaporation of this sweat from the skin surface removes heat from the body.

Detailed explanation-5: -The heart rate increases to pump more blood through outer body parts and skin so that excess heat is lost to the environment, and sweating occurs. These changes place additional demands on the body. Changes in blood flow and excessive sweating reduce a person’s ability to do physical and mental work.