Question

How will an increase in the distance a substance must travel affect the diffusion rate?

Diffusion rate will remain constant.

Diffusion rate will not be affected.

Diffusion rate will increase.

Diffusion rate will decrease.

Answer 1

• Let distance be d
• Rate of diffusion be R

Here

`\\ \rm\Rrightarrow R\propto (1)/(d)`

Rate of diffusion is inversely proportional to distance

• Higher the distance lower the rate of diffusion
• Lower the distance lower the rate of diffusion

Answer 2

The greater the distance that a substance must travel, the slower the rate of diffusion.

Step-by-step explanation:

Distance travelled: The greater the distance that a substance must travel, the slower the rate of diffusion. This places an upper limitation on cell size.