Diffusion (AQA GCSE Biology): Flashcards
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12 cards from this deck
What is diffusion?
What is diffusion?
Movement of particles from high to low concentration
Does diffusion need energy?
Does diffusion need energy?
No - it's a passive process
What is a concentration gradient?
What is a concentration gradient?
Difference in particle numbers between two areas
Temperature effect on diffusion
Temperature effect on diffusion
Higher temperature = faster diffusion
Concentration difference effect on diffusion
Concentration difference effect on diffusion
Greater difference = faster diffusion
Surface area effect on diffusion
Surface area effect on diffusion
Larger area = faster diffusion
Membrane thickness effect on diffusion
Membrane thickness effect on diffusion
Thinner membrane = faster diffusion
Oxygen diffusion in cells
Oxygen diffusion in cells
Moves in (needed for respiration)
CO2 diffusion in cells
CO2 diffusion in cells
Moves out (waste from respiration)
Urea diffusion
Urea diffusion
Moves out of cells into blood (waste)
Plant gas exchange in photosynthesis
Plant gas exchange in photosynthesis
CO2 in, O2 out
When does diffusion stop?
When does diffusion stop?
When concentration equal on both sides (equilibrium)