Which of the following is a mechanism of heat loss in hypothermia?

• A. Radiation
• B. Hyperthermia
• C. Metabolic heat production
• D. Insulation

Answer: (A)

Heat loss in hypothermia primarily occurs through radiation, which is the emission of infrared heat from the body to cooler surroundings without direct contact. In a cold environment, this energy transfer can account for a large portion of heat lost. The other options describe heat generation (metabolic heat production), a condition opposite to heat loss (hyperthermia), or a measure that reduces heat loss (insulation), not a mechanism by which heat leaves the body. So radiation is the mechanism of heat loss in hypothermia.