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BIOLOGY test rev > HOMEOSTASIS > Flashcards

HOMEOSTASIS Flashcards

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1
Q

What is homeostasis

A

maintenance of a constant internal environment

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2
Q

what happens when your body gets too hot ? (3)

A
  • hairs lie flat
  • sweating ( heat is lost by evaporation)
  • vasodilation ( arterioles get wider)
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3
Q

What happens when your body gets too cold? (3)

A
  • hairs stand on end ( to trap layer of heat)
  • shivering ( to increase cellular respiration)
  • vasoconstriction (arterioles get narrower)
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4
Q

what does the negative feedback mechanism control ? (2)

A

shivering and sweating

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5
Q

effects of it being too hot (4)

A

heat stroke
dehydration
hypothermia
enzymes denature

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6
Q

effects of it being too cold (3)

A

hypothermia
enzymes work slowly
death

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BIOLOGY test rev (26 decks)

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