Diffusion

Question 1

What is diffusion

Answer 1

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

Question 2

What 3 factors effect the diffusion rate

Answer 2

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

Question 3

What substances can move into and out of the cell membrane

Answer 3

Small molecules. E.g: oxygen, glucose, amino acids and water

Starch and protein can’t fit through the cell membrane