Movement in & out of cells
- Created by: Jessica
- Created on: 14-12-12 19:08
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- Movement in & out of cells
- Diffusion
- Passive process
- The movement of gases from an area of high concentration to a low concentration through a semi permeable membrane
- Rate of diffusion depends on 3 factors
- Concentration graduebt:- the greater the difference in concentration on either side of the exchange surface the faster diffusio
- Surface are: - The larger the exchange surface the faster diffusion is
- Thickness of exchange surface :- The thinner the exchange surface the faster the rate of diffusion
- Facilitated diffusion
- Passive process
- From an area of high concentration to low concentration through the channel proteins of the plasma membrane
- A particular carrier protein and a specific protein bind causing it to change shape and the protein molecule is released to the inside of the molecule
- Active transport
- Active process
- Movement of materials against the concentration gradient from low to high concentration using energy
- Co-transport
- Active & passive
- Sodium is pumped out via active transport, this creates a concentration gradient for the sodium (active)
- Glucose then binds with the sodium which diffuses into the cell via diffusion (passive)
- Potassium is pumped into the cell via active transport to restore ionic balance (active)
- Glucose then binds with the sodium which diffuses into the cell via diffusion (passive)
- In small intestine:- Involves glucose, sodium and potassium
- Diffusion
- Osmosis
- Movement in & out of cells
- Diffusion
- Passive process
- The movement of gases from an area of high concentration to a low concentration through a semi permeable membrane
- Rate of diffusion depends on 3 factors
- Concentration graduebt:- the greater the difference in concentration on either side of the exchange surface the faster diffusio
- Surface are: - The larger the exchange surface the faster diffusion is
- Thickness of exchange surface :- The thinner the exchange surface the faster the rate of diffusion
- Facilitated diffusion
- Passive process
- From an area of high concentration to low concentration through the channel proteins of the plasma membrane
- A particular carrier protein and a specific protein bind causing it to change shape and the protein molecule is released to the inside of the molecule
- Active transport
- Active process
- Movement of materials against the concentration gradient from low to high concentration using energy
- Co-transport
- Active & passive
- Sodium is pumped out via active transport, this creates a concentration gradient for the sodium (active)
- Glucose then binds with the sodium which diffuses into the cell via diffusion (passive)
- Potassium is pumped into the cell via active transport to restore ionic balance (active)
- Glucose then binds with the sodium which diffuses into the cell via diffusion (passive)
- In small intestine:- Involves glucose, sodium and potassium
- Diffusion
- Passive process
- The passage of water from a region of high water potential to a region of low water potential through a partially permeable membrane
- Polar and non-polar
- Movement in & out of cells
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