Distance: -The ____ the distance molecules have to travel the ____ transport will occur. This is why blood capillaries and alveoli have walls which are only ____ cell thick, ensure the rate of diffusion across them is as ____ as possible Temperature -The ____ the temperature, the ____ molecules move as they have more ____ This results in more ____ against the cell membrane and therefore a faster rate of movement across them Concentration Gradient -The ____ the difference in concentration on either side of the membrane, the ____ movement across it will occur This is because on the side with the higher concentration, more ____ collisions against the membrane will occur Surface area to volume ratio -The ____ a cell or structure is, the ____ its surface area to volume ratio is, ____ down the rate at which substances can move across its surface. -Many cells which are adapted for ____ have ____ surface area in some way - eg root hair cells in plants (which absorb water and mineral ions) and cells lining the ileum in animals (which absorb the products of digestion)

Factors Affecting Diffusion

Natisni
Vdelaj

Lestvica vodilnih

Vizualni slog

Možnosti

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