Diffusion

Question 1

What is diffusion?

Answer 1

The movement of a substance from a region of high concentration to a region of low concentration.

Question 2

What controls which substances enter and leave the cell?

Answer 2

The cell membrane.

Question 3

Is there a low or high concentration of oxygen inside the cell? Why?

Answer 3

Low concentration, the supplies are constantly being used up in resperation

Question 4

What increases the rate of diffusion?

Answer 4

• The cell membrane has a bigger surface area
• There is a bigger difference between concentrations (a steeper concentration gradient)
• The particles have a shorter distance to travel