11 - Diffusion Flashcards
1
Q
What is diffusion?
A
When particles spread from areas of high concentration to low until equilibrium is reached
2
Q
What happens to the diffusion rate if the difference in concentration is big?
A
High diffusion rate
3
Q
What kind of wall do particles pass through?
A
Partially permeable membrane
4
Q
Name some particles that can’t diffuse
A
Starch and protein are too big
5
Q
What factors affect diffusion?
A
Temperature and concentration
6
Q
What is a concentration gradient?
A
The difference in concentration between two regions
7
Q
Two areas in th body where diffusion is important
A
Lungs
Small intestine
8
Q
Which gas diffuses into cells?
A
Oxygen
