Cell Division & Transport

Question 1

Explain what diffusion is:

Answer 1

The movement of particles in a liquid or gas from an area of high concentration to an area of lower concentration. This is a passive process because it moves down the concentration gradient.

Question 2

Explain what osmosis is:

Answer 2

The movement of water from a dilute solution (high water concentration) to a more concentrated solution (low water concentration) across a partially permeable membrane. This is a passive process as it moves down the concentration gradient

Question 3

Explain what active transport is:

Answer 3

The movement of particles in a liquid or gas across a cell membrane from an area of low concentration to an area of high concentration. Carrier proteins are needed for this process as it is an active process meaning it requires energy since it goes against the concentration gradient.

Question 4

Using your knowledge of cell transport, explain how minerals enter the root cell:

Answer 4

Active transport is used. The plant uses energy to move the minerals against the concentration gradient from the soil into the root cells.

Question 5

Why is it important at for plants to use energy in active transport?

Answer 5

In order to absorb the nutrients from the soil so that they can survive