Diffusion through a selectively-permeable membrane: practical

12 questions

1. What is the name of the structure labelled A in the diagram of an animal cell?
2. What is the job of the cell membrane in an animal cell?
3. The cell membrane has lots of small ___ in it.
4. Who correctly explains how the particles of oxygen got into the cell?
5. Particles of carbon dioxide …
6. The ___ movement of carbon dioxide particles will be from inside to outside.
7. Particles of iodine can only move through holes in the membrane because they are ...
8. Particles of starch are too ___ to move though holes in the membrane.
9. Particles of iodine move through the membrane into the tubing due to diffusion down a ___ gradient.
10. Because particles of iodine can move through the membrane but particles of starch cannot, the membrane is described as ___-permeable.
11. The diagram shows the experiment at the start. Who correctly predicts what the liquid **inside** the tubing will look like after 10 minutes?
12. The diagram shows the experiment after 10 minutes. Match each observation to the correct explanation for it.

License: OGL