Movment In and Out Of Cell
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What is a diffusion
Movment of particles from their high concentration to their low concentration down a concentration gradient
Factors affect rate of movment
High temperature will increase rate of movment so more energy so more kinetic energy so particles move faster High concentration gradient will increase rate if movment Shorter diffusion distance will increase rate of diffusion Large surface area to volume ratio will increase rate of movment
What is active transport
Movment of molecules from thier lower concentration to their higher concentration against concentration gradient using energy from respiration
What is a passive process
Doesn’t consume metabolic energy
Active process
Consume metabolic energy
What is osmosis
It’s movment of water molecules from higher water potential to low water potential through a partially permeable membrane
Difference between osmosis and diffusion and active transport
Diffusion passive, doesn’t require energy,moves substances down a concentration gradient,moves substances from high to a low concentration, osmosis, passive, doesn’t require energy,moves substances down a concentration gradient,moves substances from a high to low concentration Movment of water only, active transport,requires energy,moves molecules against a concentration gradient, moves substances from a low to high concentration