B1.6 Diffusion

Question 1

What is diffusion?

Answer 1

The net movement of particles from an area of high concentration to an area of low concentration with a concentration gradient

Question 2

What factors affect the rate of diffusion?

Answer 2

Concentration gradient

Temperature

Question 3

How does a concentration gradient affect the rate of diffusion?

Answer 3

The bigger the difference - the faster the rate of diffusion as more particles will move randomly toward the area of low concentration

Question 4

How does the temperature affect the rate of diffusion?

Answer 4

Means more particles have more kinetic energy - this will lead to them moving around quickly - causing the net movement of particles to speed up - increasing the rate of diffusion

Question 5

How does oxygen get into your red blood cells?

Answer 5

Air in the lungs diffuse into red blood cells from an area of high concentration to an area of low concentration

Question 6

Why does diffusion take place more if the surface area is increased?

Answer 6

Much more of a substance moves in a given time