Diffusion Flashcards

1️⃣ Familiarise yourself with the flashcards:

  • Look through all the flashcards to see what’s on both sides.
  • Make sure you understand the information on each card. If something’s unclear, click the link to the revision notes at the bottom of the page for more details.

2️⃣ Test yourself:

  • Look at the question or prompt on each card and try to remember the answer before flipping it over.
  • Check the answer and make a note of any cards you find challenging and need to go over more.

3️⃣ Consistently Review and Practice:

  • Use spaced repetition: spend more time on the cards you struggle with and go over them more often.
  • Regularly review all the flashcards to help you better understand and retain the information over time.

Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What is diffusion?

Diffusion is the spreading out of particles of a substance in solution or particles of a gas, moving from an area of high concentration to an area of low concentration.

Is diffusion an active or passive process and why?

Diffusion is a passive process because it does not require any energy.

What types of substances can be transported across cell membranes by diffusion?

Substances such as carbon dioxide, oxygen, water, food and waste can be transported across cell membranes by diffusion.

Why do cells need to take in oxygen?

Cells need oxygen for respiration, which takes place in the mitochondria to produce energy.

How does oxygen enter the cells from the lungs?

Oxygen diffuses across the barrier between the alveoli and the surrounding capillaries and then diffuses from the bloodstream into the cells.

What happens to carbon dioxide produced in the cells during respiration?

Carbon dioxide, a waste product of respiration, diffuses out of the cell and into the bloodstream to be exhaled from the lungs.

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