Roles of diffusion in living things Practice exercise 3

Explain how plants absorb mineral salts from the soil through diffusion.  (2 marks)

Explain how plants absorb mineral salts from the soil through diffusion.  (2 marks)

  Refer to an image below of fish under water. Explain how diffusion helps a fish to breathe underwater.  (2 marks)

  Refer to an image below of fish under water. Explain how diffusion helps a fish to breathe underwater.  (2 marks)

Refer to the image below of fish under water. Explain how diffusion helps a fish to breathe underwater.  (2 marks)

Why is diffusion important for gaseous exchange in animals?   (2 marks)

Why is diffusion important for gaseous exchange in animals?   (2 marks)

Explain how nutrients from digested food reach the bloodstream through diffusion.  (2 marks)

Explain how nutrients from digested food reach the bloodstream through diffusion.  (2 marks)

Explain how nutrients from digested food reach the bloodstream through diffusion.  (2 marks)

Refer to the image below showing root hairs in contact with soil particles. Describe the role of diffusion in the process taking place. (2 marks)

Refer to the image below showing root hairs in contact with soil particles. Describe the role of diffusion in the process taking place. (2 marks)

Refer to the image below showing root hairs in contact with soil particles. Describe the role of diffusion in the process taking place. (2 marks)

The image below shows a plant leaf and a droplet of water near it. Explain how diffusion helps in the release of oxygen from the plant after photosynthesis.  (1 mark)

The image below shows a plant leaf and a droplet of water near it. Explain how diffusion helps in the release of oxygen from the plant after photosynthesis.  (1 mark)

A boy eats fruits during lunch break. Later, he begins running in a school race. Using the image below showing body cells, explain how diffusion helps his body use the food energy.  (2 marks)

A boy eats fruits during lunch break. Later, he begins running in a school race. Using the image below showing body cells, explain how diffusion helps his body use the food energy.  (2 marks)

A doctor tells a patient with diabetes that sugar levels in the blood are high and are not entering the body cells properly. Explain how this relates to diffusion.  (1 mark)

A doctor tells a patient with diabetes that sugar levels in the blood are high and are not entering the body cells properly. Explain how this relates to diffusion.  (1 mark)

Melissa was making a drink and put just one tiny drop of bright red food coloring into a clear glass of still water. She noticed that even without stirring, after a little while, the whole glass of water turned light pink. Explain why the red color spread out all by itself.  (2 marks)

Melissa was making a drink and put just one tiny drop of bright red food coloring into a clear glass of still water. She noticed that even without stirring, after a little while, the whole glass of water turned light pink. Explain why the red color spread out all by itself.  (2 marks)

A newborn baby is placed in an incubator with carefully controlled oxygen. Explain why proper diffusion is important in this situation.  (2 marks)

A newborn baby is placed in an incubator with carefully controlled oxygen. Explain why proper diffusion is important in this situation.  (2 marks)

A newborn baby is placed in an incubator with carefully controlled oxygen. Explain why proper diffusion is important in this situation.  (2 marks)

During an asthma attack, breathing becomes difficult. Explain how this affects diffusion in the lungs.  (2 marks)

During an asthma attack, breathing becomes difficult. Explain how this affects diffusion in the lungs.  (2 marks)