Homeostasis

Question 1

What is the definition of homeostasis?

Answer 1

The maintenance of a constant internal environment.

Question 2

Name 4 things inside your body needs to keep at just the right level?

Answer 2

Body temperature
Water content
Ion content
Blood sugar level

Question 3

Name two waste products your that your body produces that it needs to constantly get rid of?

Answer 3

Carbon dioxide- leaves the body by the lungs when you breathe out.
Urea - product from excess amino acids.

Question 4

What temperature will enzymes in your body work best at?

Answer 4

37 degrees.

Question 5

What happens when the enzymes don’t work properly?

Answer 5

Some reactions could be disrupted.

Question 6

What acts as your own personal thermostat?

Answer 6

There is a thermoregulatory centre in the brain.

Question 7

What does it contain?

Answer 7

Receptors that are sensitive to the temperature of the blood flowing through the brain.

Question 8

Where does the thermoregulatory centre receive impulses from?

Answer 8

The skin giving info about skin temperature.

Question 9

Name 3 things your body does when your too hot?

Answer 9

Hairs lie flat
Sweat is produced by the sweat glands and evaporates from the skin, which removes heat.
The blood vessels supplying the skin dilate so more blood flows close to the surface of the skin. This makes it easier for the heat to be transferred from the blood to the environment.

Question 10

Name 3 things the body does when your too cold?

Answer 10

Hairs stand up to trap an insulating layer of air.
No sweat is produced
Blood vessels supplying skin capillaries constrict to close off the skins blood supply.
You shiver too, this needs respiration which releases some energy to warm the body.