Question

People who are born without sweat glands are likely to die of heat stroke in the tropics. This indicates that, under tropical conditions, the human body may:

Answer 1

gain, rather than lose, heat by radiation.

Step-by-step explanation:

The body is can lose the heat by evaporation, radiation, conduction, and convection. The sun transfers the heat on the earth through radiation which we absorb and our body temperature rises. The loss of heat from the body through radiation occurs normally when the air temperature is below 20-degree Celcius.

But in tropical regions, the temperature is very high so the gain of heat by radiation is more than the loss of heat by radiation which can lead to heatstroke in those people who do not have sweat glands because in this condition 85% of heat can be lost by sweating.