Homeostatis

Question 1

Name 4 things you have to keep constant in the body

Answer 1

• Temperature
• Water content
• Ion content
• Blood sugar levels

Question 2

What two things does your body need to get rid of?

Answer 2

• Carbon dioxide (from respiration)

- Urea (from liver and breakdown of amino acids)

Question 3

What happens if your body gets too hot?

Answer 3

Enzymes denature and reactions are disrupted

Question 4

What is in the thermoregulatory centre in the brain?

Answer 4

Receptors that are sensitive to blood temperature in the brain

Question 5

What gets sent to thermoregulatory centre in the brain?

Answer 5

Impulses from skin about skin temperature

Question 6

What does your body do if it gets too hot?

Answer 6

1) Blood vessels dilate, sending more blood to the skin, where heat can be lost
2) Sweat is produced, which takes heat energy from skin to evaporate

Question 7

What does your body do if it gets too cold?

Answer 7

1) Hairs stand up which traps a layer of insulating air
2) Blood vessels constrict, which reduces blood sent to the skin so heat is conserved
3) Muscles shiver, which causes respiration, which releases energy

Question 8

What is homeostasis?

Answer 8

The maintenance of constant internal conditions