Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Why is sweating an effective way to cool the body?
A
Sweat absorbs heat from the environment, lowering body temperature.
B
Sweat increases blood flow to the skin, which directly cools the blood.
C
Sweat contains enzymes that break down heat molecules, reducing body temperature.
D
Sweat evaporates from the skin, removing heat and cooling the body.
Verified step by step guidance
1
Understand the process of thermoregulation: The body maintains its internal temperature through various mechanisms, one of which is sweating.
Recognize the role of sweat glands: Sweat glands produce sweat, a liquid composed mainly of water and salts, which is secreted onto the surface of the skin.
Identify the principle of evaporative cooling: When sweat evaporates from the skin, it requires heat energy to change from a liquid to a vapor. This heat energy is taken from the body, thus cooling it down.
Clarify the misconception: Sweat does not absorb heat from the environment, increase blood flow to cool the blood, or contain enzymes that break down heat molecules. These are incorrect explanations of how sweating cools the body.
Conclude with the correct mechanism: The primary way sweating cools the body is through the evaporation of sweat, which removes heat from the skin and lowers body temperature.