HOMEOSTASIS

Question 1

What is homeostasis

Answer 1

maintenance of a constant internal environment

Question 2

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

Answer 2

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

Question 3

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

Answer 3

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

Question 4

what does the negative feedback mechanism control ? (2)

Answer 4

shivering and sweating

Question 5

effects of it being too hot (4)

Answer 5

heat stroke
dehydration
hypothermia
enzymes denature

Question 6

effects of it being too cold (3)

Answer 6

hypothermia
enzymes work slowly
death