Homeostasis

Question 1

what is homeostasis?

Answer 1

maintenance of a constant internal environment

Question 2

why is body temperature regulation (BTR) important?

Answer 2

allows proper functioning of enzymes

Question 3

what detects the change in blood temperature (BTR)?

Answer 3

thermoregulatory centre in brain

Question 4

what happens if your body temperatures not kept at 37*C?

Answer 4

• too cold- hypothermia

- too hot- heat stroke

Question 5

how does your body cool down?

Answer 5

• sweating-removes heat by evaporation

- blood vessels widen to allow blood closer to the surface -(vasodilation)

Question 6

how does your body warm up?

Answer 6

• stop sweating
• blood vessels narrow to reduce blood flow close to the -surface (vasoconstriction)
• shivering
• hairs stand on ends- traps insulating layers of air

Question 7

what does homeostasis involve?

Answer 7

homeostasis involves the nervous system and the hormonal system

Question 8

what levels in the body need to be controlled?

Answer 8

• sugar
• water
• temperature
• blood sugar

Question 9

nervous system…

Answer 9

• fast, short lived
• electrical impulses
• very precise area

Question 10

hormonal system…

Answer 10

• slow, long lasting

- secreted from glands into the blood