Thermoregulation — Flashcards

Flashcard 1: heat stroke occurs due to _____

Answer: failure of heat regulation

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Flashcard 2: heat syncope occurs due to _____

Answer: vasodilation

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Flashcard 3: heat exhaustion occurs due to _____

Answer: impaired salt and water balance in the body

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Flashcard 4: Pyrogens induce fever via increased production of _____, which acts on the anterior hypothalamus to increase local production of prostaglandins

Answer: IL-1

Flashcard 5: Reason for paradoxial undressing is _____-induced paralysis of the vasomotor nerves, leading to vasodialation.

Answer: cold

Flashcard 6: Exposure to cold temperatures activates centers in the _____ hypothalamus, which then activate and motoneurons innervating skeletal muscle, causing shivering

Answer: posterior

Flashcard 7: Heat _____ occurs because of vasodilation and volume depletion(from sweating) following exercise or prolonged standing

Answer: syncope

Flashcard 8: Numbness is an effect of _____ stress.

Answer: cold

Flashcard 9: Once the body temperature has fallen below about _____, the ability of the hypothalamus to regulate temperature is lost.

Answer: 85F (30C)

Flashcard 10: Hypothermia occurs when the body's core temperature drops below _____C.

Answer: 35

Flashcard 11: BMR of the body is _____ in cold environment

Answer: increased