Diffusion Flashcards
1
Q
What is diffusion
A
Diffusion is the spreading out of particles from an area of higher concentration to an area of lower concentrations. E.g: perfume through the air
2
Q
What 3 factors effect the diffusion rate
A
The bigger the concentration gradient, the faster
High temperature will give a faster rate, the particles have more energy so move around faster
The larger the surface area of the membrane, more particles can pass through at once
3
Q
What substances can move into and out of the cell membrane
A
Small molecules. E.g: oxygen, glucose, amino acids and water
Starch and protein can’t fit through the cell membrane
