A scientist investigated how sodium chloride concentration affects kidney cells from a mammal.
The cells had an initial mean diameter of 14.0 μm.
| Solution | Sodium chloride concentration in g/dm³ | Mean diameter after 10 minutes in μm |
|---|---|---|
| A | 3.0 | 16.2 |
| B | 9.0 | 14.0 |
| C | 15.0 | 12.1 |
Give the sodium chloride concentration that is equal to the concentration of the cell contents.
Explain the changes in mean diameter of the cells in solutions A and C.
A new group of the cells is placed in a sodium chloride solution with a concentration of 12.0 g/dm³.
Suggest how the mean diameter of these cells would change after 10 minutes. Explain your answer.
140 exam-style questions on AQA GCSE Biology 1.3 Transport in cells, covering 1.3.1 Diffusion, 1.3.2 Osmosis, and 1.3.3 Active transport. Each one has a worked solution and a mark scheme showing where the marks go.