B1.7 - Osmosis

Question 1

What is Osmosis?

Answer 1

Osmosis is a special type of diffusion. It is when water move from a dilute to a more concentrated area through a partially permeable membrane that allows water through.

Question 2

What is a dilute solution of sugar?

Answer 2

It is a solution that contains a high concentration of water (the solvent) and a low concentration of sugar (the solute)

Question 3

What is a concentrated solution of sugar?

Answer 3

It is a solution with a high concentration of sugar (the solute) and a low concentration of water (the solvent)

Question 4

What is cytoplasm made up of? (2 Parts)

Answer 4

• A solution of chemicals dissolved in water

- A fairly concentrated solution of salts and sugars

Question 5

How does osmosis happen across the cell membrane?

Answer 5

Water outside of the cell is in a dilute solution. It moves to a concentrated solution inside the cell, across the cell membrane.

Question 6

Why does the concentration of solutes in the body need to stay at the same level?

Answer 6

If the solutes are at different levels of concentration, cells could end up swelling and bursting, or shrivelling up from lack of water.

Question 7

What is the term for when the concentration of solutes inside and outside of the cell is the same?

Answer 7

The external solution is isotonic to the cell

Question 8

What is the term for when the concentration of solutes outside of the cell is greater than the internal concentration?

Answer 8

The external solution is hypertonic to the cell

Question 9

What is the term for when the concentration of solutes outside of the cell is less than than the internal concentration?

Answer 9

The external solution is hypotonic to the cell

Question 10

What happens to animal cells if the concentration of the internal and external solutions has too great a difference?

Answer 10

The cell can either shrivel up (hypertonic) or burst (hypotonic)