Mammals can lower their body surface temperature through the evaporation of fluids from:
Correct answer: D. Sweat glands
- A. Loop of Henle
- B. Saliva
- C. Urine
- D. Sweat glands
Explanation
The correct answer is sweat glands. Sweat glands are essential for thermoregulation in mammals as they produce sweat, which evaporates from the skin surface, lowering body temperature. The loop of Henle, while involved in concentration of urine, does not contribute to surface cooling. Similarly, saliva, though used in some animals for cooling, is not a primary mechanism in mammals. Urine is merely a waste product and does not contribute to body temperature regulation through evaporation.
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About Homeostasis
Homeostasis maintains a stable internal environment through the kidney and urinary system, thermoregulation and excretion. The kidney topics include filtration, selective reabsorption, urine formation and water balance, while thermoregulation involves sweating, vasodilation, vasoconstriction and hormonal control; excretion is different from egestion, which removes undigested food.
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