Question

During fever

• A. The body losses its themoregulatory capabilities.
• B. Body temperature continues to rise.
• C. Neurocontrol of peripheral vasculature is lost.
• D. The hypothalamic set point temperature has been reset at a supernormal level.

Answer 1

The correct option is D The hypothalamic set point temperature has been reset at a supernormal level.

Fever, also known as pyrexia and febrile response, is defined as having a temperature above the normal range due to an increase in the body's temperature set-point. The increase in set-point triggers increased muscle contraction and causes a feeling of cold. This results in greater heat production and efforts to conserve heat. When the set-point temperature returns to normal a person feels hot, becomes flushed and may begin to sweat. Temperature is regulated in the hypothalamus. The hypothalamus works like a thermostat. When the set point is raised, the body increases its temperature through both active generation of heat and retention of heat.