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10 cards from this deck
Movement of particles from higher to lower concentration
Passive transport (no energy required)
Distance, concentration difference, surface area
Increases rate (particles have more kinetic energy)
One cell thick (short diffusion distance)
Millions of alveoli provide large total surface area
Maintains concentration gradient for diffusion
Helps gases dissolve and diffuse across membrane
Rate ∝\propto∝ (surface area ×\times× conc. diff.) / thickness
Oxygen and carbon dioxide
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