GCSE Biology Homeostasis, control of blood sugar levels and water levels

  • Created by: RLou03
  • Created on: 23-09-18 10:04
What is homeostasis?
Where you keep your internal environment as constant as possible.
1 of 12
What does insulin do?
It tells cells to take up glucose. It also tells cells such as the liver and muscles to convert glucose to glycogen for storage.
2 of 12
What is glucagon?
A hormone released by the pancreas when it detects that sugar levels are too low. It tells cells to convert glycogen back into glucose.
3 of 12
What do the kidneys do?
They remove urea, produced by the liver. They also remove excess water and mineral ions.
4 of 12
During selective absorption, what remains in the capillaries?
Plasma, red blood cells, white blood cells, protein and platelets.
5 of 12
How much glucose is reabsorbed?
All
6 of 12
How much ions are reabsorbed?
some
7 of 12
How much urea is reabsorbed?
none
8 of 12
How much water is reabsorbed?
some
9 of 12
What is urea?
In the liver, excess proteins get broken down into amino acids. Excess amino acids are converted into fats and carbohydrates, which can be stored. This is called deamination. Ammonia is formed as a by product. As ammonia is toxic, it is broken down
10 of 12
What is urea(continued)?
into urea. Urea is then transported to the kidneys where it is filtered out of the blood and is excreted as urine.
11 of 12
Why does the body sometimes reject kidney transplants?
All cells are covered in antigens. If your immune system doesn't recognise these antigens, it will attack them with antibodies.
12 of 12

Other cards in this set

Card 2

Front

What does insulin do?

Back

It tells cells to take up glucose. It also tells cells such as the liver and muscles to convert glucose to glycogen for storage.

Card 3

Front

What is glucagon?

Back

Preview of the front of card 3

Card 4

Front

What do the kidneys do?

Back

Preview of the front of card 4

Card 5

Front

During selective absorption, what remains in the capillaries?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Homeostasis resources »