Cellular transport
- Created by: anxious_student123
- Created on: 26-09-21 19:16
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- Cellular transport
- Diffusion
- when particles are in a high concentration they move to a low concentration
- it will move in both directions, but it is a net movement from high to low concentration
- will end up evenly spread through the liquid and gas
- difference in concentration is called a concentration gradient
- the rate of diffusion is affected by these factors
- concentration gradient-greater difference in concentration the quicker the diffusion
- the temperature- higher the temperature the more kinetic energy and will move and mix quickly
- the surface area of the cell membrane separating different regions
- the greater the surface area, the fastest rate of diffusion
- Osmosis
- Osmosis is the diffusion of water molecules
- the molecules move from high concentration to low concentration
- through a partially permeable membrane
- the molecules move from high concentration to low concentration
- a dilute solution contains a high concentration of water molecules
- a concentrated solution contains a low concentration of water molecules
- movement of water molecules only
- Osmosis is the diffusion of water molecules
- Active transport
- substance is passed against a concentration gradient (requires energy)
- active transport in cells
- plants take up minerals and ions through root hair cells
- both of these processes require energy from respiration
- glucose molecules have to be moved across the gut wall into the blood
- plants take up minerals and ions through root hair cells
- energy is not required for diffusion or osmosis just active transport
- Diffusion
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