Diffusion through a selectively-permeable membrane: practical
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Waxaan sharxi karaa indha-indheynta faafitaanka iyada oo loo marayo xuub si gaar ah u daloola (selectively-permeable membrane).
Introduction
In this lesson: I can explain observations of diffusion through a selectively-permeable membrane. Particles of some substances are small enough to diffuse through holes in a selectively-permeable membrane. Particles of these substances move through the selectively-permeable membrane in both directions.
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Quizzes
1. What is the name of the structure labelled A in the diagram of an animal cell?
- Correct answer:cell membrane
- cell wall
- cytoplasm
- nucleus
2. What is the job of the cell membrane in an animal cell?
- Correct answer:It controls what can enter and leave the cell.
- It is a fluid that fills the cell.
- It is where photosynthesis takes place.
- It stores the cell’s DNA.
3. Who correctly explains how the particles of oxygen got into the cell?
- Jacob: “The cell breathed the oxygen particles in.”
- Correct answer:Aisha: “The particles diffused through the cell membrane.”
- Lucas: “The cell sucked them in from the blood.”
- Sofia: “The cell is fully permeable to all particles, including oxygen.”
4. Particles of carbon dioxide …
- Correct answer:can move through the cell membrane in both directions.
- cannot move through the cell membrane.
- will only move through the membrane from inside the cell to outside the cell.
- will only move through the membrane from outside the cell to inside the cell.
1. Particles of iodine can only move through holes in the membrane because they are ...
- concentrated.
- heated.
- large.
- Correct answer:small.
2. Particles of iodine move through the membrane into the tubing due to diffusion down a {{}} gradient.
- Correct answer:concentration
- diffusion
- movement
- net
3. The diagram shows the experiment at the start. Who correctly predicts what the liquid **inside** the tubing will look like after 10 minutes?
Alex: “It will be yellow or pale brown.”
Andeep: “It will still be colourless.”- Correct answer:
Sofia: “It will be blue/black.”
What pupils see
The same lesson as a pupil sees it. You can set any section as work on its own.
- IntroductionPrepare
- Starter quizActivate · 4 questions
- Lesson videoLearn
- Exit quizCheck · 3 questions