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.

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What is diffusion?

Diffusion is the net movement of particles from an area of higher concentration to an area of lower concentration.

What causes diffusion to happen?

Particles move randomly and spread out, so they move from crowded areas to less crowded areas.

In which states of matter can diffusion take place?

Diffusion takes place in liquids and in gases, where particles can move freely.

Does diffusion need energy from respiration?

No. Diffusion is a passive process and does not need energy from the cell.

What is meant by a concentration gradient?

A concentration gradient is the difference in concentration between two areas.

In diffusion, which way do particles move in relation to the concentration gradient?

Particles move down the concentration gradient, from higher concentration to lower concentration.

What happens when the concentration is the same on both sides during diffusion?

Particles still move, but there is no net movement, because the concentration is equal on both sides.

How does diffusion help oxygen get into body cells?

Oxygen diffuses from the blood, where its concentration is higher, into body cells, where its concentration is lower.

How does diffusion help remove carbon dioxide from the body at the lungs?

Carbon dioxide diffuses from the blood, where its concentration is higher, into the air in the alveoli, where its concentration is lower, and is then breathed out.

What kind of particles can diffuse through a cell membrane?

Small particles such as oxygen, carbon dioxide and some dissolved food molecules can diffuse through a cell membrane.

What is the role of the cell membrane in diffusion?

The cell membrane controls what enters and leaves the cell and allows some substances to diffuse through but not others.

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