pptx, 187.37 KB
pptx, 187.37 KB
docx, 821.21 KB
docx, 821.21 KB
2018 AQA GCSE Combined Science Specification
Topic - Cells

Part of specification covered:

Substances may move into and out of cells across the cell membranes via diffusion.

Diffusion is the spreading out of the particles of any substance in solution, or particles of a gas, resulting in a net movement from an area of higher concentration to an area of lower concentration.

Some of the substances transported in and out of cells by diffusion are oxygen and carbon dioxide in gas exchange, and of the waste product urea from cells into the blood plasma for excretion in the kidney.

Students should be able to explain how different factors affect the rate of diffusion.
Factors which affect the rate of diffusion are:
• The difference in concentrations (concentration gradient)
• The temperature
• The surface area of the membrane
Creative Commons "Sharealike"

Reviews

5

Something went wrong, please try again later.

MACS0647-JD

4 years ago
5

Thank you. Very helpfu.

MissGJ97

5 years ago
5

Great to adapt to KS3 level

regineromatis

6 years ago
5

Thank you for sharing!

Report this resourceto let us know if it violates our terms and conditions.
Our customer service team will review your report and will be in touch.