B3b Diffusion Answer Higher

B3b Diffusion Answer

HideShow resource information
  • Created by: Amira
  • Created on: 14-05-12 07:25
Preview of B3b Diffusion Answer Higher

First 123 words of the document:

B3b Diffusion
1. The diffusion is the net movement of particles from an area of higher concentration
to an area of lower concentration. It is a natural process.
2. Enzymes control and catalyse many chemical reactions in living things. Which of
the following process that is not controlled by enzymes.
Protein synthesis / photosynthesis / diffusion / respiration
3. Substances such as oxygen can enter and leave cells by diffusion.
Look at the diagrams of five cells.
The dots show the concentration of oxygen.
Which diagram shows the diffusion of oxygen?
Choose A, B, C, D or E.
B
Higher only:
4. The diagrams show air sacs from the lungs of three different people.

Other pages in this set

Page 2

Preview of page 2

Here's a taster:

What is the scientific name for the air sacs in lungs?
alveoli
(ii) 1 His alveoli has more surface area than John or Alan
2 His alveoli has more blood capillaries so higher chance of diffusion…read more

Comments

No comments have yet been made

Similar Science resources:

See all Science resources »See all resources »