B3.3.3 - Maintaining water balance

Question 1

What is the removal of waste products called?

Answer 1

Excretion

Question 2

What happens if there is too much water in our blood plasma?

Answer 2

It will move into your blood cells causing them to swell and burst (lysis)

Question 3

What happens if there is loo little of water or too much of a solute present?

Answer 3

Water will diffuse out of the body cells causing them to shrink

Question 4

What is urine?

Answer 4

A solution contains urea, water and other waste substances

Question 5

What produces urea?

Answer 5

The liver

Question 6

What filters urea out of your blood and produces urine constantly?

Answer 6

Your kidneys

Question 7

If you are short of water, what urine is produced?

Answer 7

Very little concentrated urine

Question 8

If you take in too much water, what urine is produced?

Answer 8

Lots of dilute urine is produced

Question 9

What is selective reabsorption?

Answer 9

When the kidney filters the substances. If it is useful it is put back into the blood