so what changes the rate of movement across the cell membrane ? AS Biology

• the concentration gradient so how differently concentrated the two solutions are the one in the cell and the one out of the cell
• the size of the particle travelling across the cell surface membrane if they are small they move quickly
• how charged this particle is ( simple diffusion )
• the surface area on which the particle can diffuse
• the distance between the 2 regions of varying concentration
• the temperature , if diffusions happens at a slightly higher temperature then the particle have a bit more kinetic energy which will allow more diffusion to happen.
•  how thin the memebrane is
• how many protiens there are ( facillitated diffusion)

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• the concentration gradient so how differently concentrated the two solutions are the one in the cell and the one out of the cell
• the size of the particle travelling across the cell surface membrane if they are small they move quickly
• how charged this particle is ( simple diffusion )
• the surface area on which the particle can diffuse
• the distance between the 2 regions of varying concentration
• the temperature , if diffusions happens at a slightly higher temperature then the particle have a bit more kinetic energy which will allow more diffusion to happen.
• how thin the memebrane is

these 3 processes require energy in order for them to happen , this energy comes from ATP produced by respiration , so anything that affects the rate of respiration will also affect these processes

• oxygen concentration
• concentration gradient
• respitory inhibitors
• temperature / ph ( as it could denature the protein)
• how thin the membrane is
• surface area