B1b - Cell transport Flashcards
1
Q
What is diffusion?
A
The movement of substances in and out of cells, across the cell membrane. Moving from a higher concentration to a lower concentration
2
Q
Give an example of diffusion
A
Oxygen and carbon dioxide in lungs
Urea into blood
3
Q
What are the factors that affect the rate of diffusion?
A
Concentration gradient, temperature, surface area of membrane
4
Q
A
