B2.1.1 - Diffusion

Question 1

What is diffusion?

Answer 1

It is the net movement of particles from a region of high concentration to a region of low concentration

Question 2

What type of process is diffusion?

Answer 2

It is a passive process as it does not require energy

Question 3

How does our body use diffusion?

Answer 3

Our body need oxygen and glucose for respiration so when they are needed our blood transports these around the body and they diffuse into the cells that need them

Question 4

How does decreasing the distance the particles need to move increase the rate of diffusion?

Answer 4

It takes less time to travel a shorter distance therefore the rate of diffusion is quicker

Question 5

How does increasing the concentration gradient increase the rate of diffusion?

Answer 5

The steeper the concentration gradient, the greater the net movement of particles

Question 6

How does increasing the surface area increase the rate of diffusion?

Answer 6

This allows for more space for diffusion so more particles can move in a period of time