B1.6 Diffusion

Question 1

What is diffusion

Answer 1

Spreading out of the particles in a gas.

Question 2

How does diffusion increase

Answer 2

Increases when there is a bigger difference in concentration between two areas.

Question 3

What is concentration gradient

Answer 3

The difference in the concentration of particles between two areas. Particles naturally move down this gradient (from high to low concentration) during diffusion. A steeper gradient leads to a faster rate of movement.

Question 4

What factors affect the rate of diffusion

Answer 4

1. the concentration
2. gradient temperature
3. surface area
4. distance

Question 5

What is gas exchange

Answer 5

The process where oxygen enters the blood and carbon dioxide leaves it, which happens by diffusion in the alveoli of the lungs.

Question 6

What does diffusion result in

Answer 6

The movement of particles from an region of high concentration to an region of low, down a concentration gradient. Its crucial for substances like oxygen and carbon dioxide moving in and out of cells.