Displace the set point of hypothalamus above the normal point of 37°C:
Correct answer: C. Pyrogens
- A. Pyrenins
- B. Pyridoxins
- C. Pyrogens
- D. All (A), (B) and (C)
Explanation
Pyrogens are substances that cause fever by acting on the hypothalamus to raise the body's temperature set point. They can be either exogenous (coming from outside the body, like bacterial toxins) or endogenous (produced within the body, like during inflammation). When pyrogens are present, the hypothalamus raises the set point for body temperature, leading to fever as the body tries to reach the new, higher temperature set point.
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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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