B1.7-8 Osmosis

Question 1

What is osmosis ?

Answer 1

Net movement of water molecules across a partially permeable membrane from a region of high water concentration to a region of lower water concentration

Question 2

What does water concentration mean ?

Answer 2

The amount of water compared to the other molecules like sugar or salts that are dissolved in the water

Question 3

If the concentration is the same in the f cell as it is outside what is it called?

Answer 3

Isotonic

Question 4

If the concentration inside the cell is lower than outside the cell it is called

Answer 4

Hypotonic

Question 5

If the concentration outside the cell is lower than inside the cell it is

Answer 5

Hypotonic

Question 6

Why is osmosis important in animals ?

Answer 6

Cells use up water in chemical reactions
Dilute cytoplasm

Question 7

Why is it important in plants

Answer 7

To support their stems and leaves
Needed to keep the cells turgid to move water in the right direction