transport in cell part 1

What is diffusion

net movement of particles from an area of high concentration to an area of lower concentration down a concentration gradient

which states can diffusion happen

gases and liquids because particles are free to move randomly

what are 3 ways you can increase the rate of diffusion

increasing the temperature

increasing the surface area

increasing the concentration gradient

name 3 examples where diffusion can take place

oxygen getting taken into cells

carbon dioxide is removed from cells

what is osmosis

the movement of water molecules from and area of highwater concentration to an area of low water concentration across a partially permable membrane

give an example of osmosis

root hair cell takes in water from soil as there is a high concentration gradient outside in the soil , causing the water particles to pass into the cell where there is a lower concentration gradient

what is active transport

net movement of particles from an area of low concentration to an area of high concentration using energy from respiration (energy)

examples of active transport

in a human gut there is low concentration of nutrients compared to the blood, active transport allows nutrients to be absorbed into the blood stream