Diffusion

Question 1

Name a gas that is diffused out of cells?

Answer 1

Carbon dioxide

Question 2

Defiine the term diffusion?

Answer 2

Diffustion is when particles slowly form an area of high concentration to a low concentration down a concentration gradient

Question 3

How does the surface area affect the rate of diffusion

Answer 3

The larger the surface area to volume ratio the faster the rate of diffusion occurs

Question 4

How does the temperature affect the rate of diffusion?

Answer 4

The rate increases because when heated the particles have an increase they move faster

Question 5

How does concentration the rate of diffusion?

Answer 5

The larger the concentration gradient the faster the rate of diffusion

Question 6

Describe how human lungs are adapted for efficient gasous exchange?

Answer 6

Dvarevedi: have a larger surface area and have a good blood supply to keep up the concentration gradient
Aveoli: The aveoli walls are thin, so diffusion happens quickly

Question 7

Describe how plant roots and leaves are adapted for effiecient gaseous exchange?

Answer 7

They have a large surface area to volume ratio and stomata which allows carbon dioxide into the leaf

Question 8

Which features allow efficient gaseuos exchange for most organisms?

Answer 8

• large surface area
• thin walls in the aveoli
• good blood supply to keep up the concentration

Question 9

Describe how fish gills are adapted for efficeint gaseous exchange?

Answer 9

The gills have a large surface area to volume ratio and there is only a short distance required for diffusuion to go. The outer layer of gills are thin