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Surface area to volume ratio and importance
Increasing the surface area to volume ratio allows more surface molecules to diffuse
Cells can achieve a higher Surface area: Volume ratio by folding the membrane or reducing size of cells
total surface area/ volume = Ratio
Total volume
Sa:Vol ratio (
Concentration gradients
Increase concentration gradient increase opportunity for substances to diffuse in/out cell → faster/higher rate of movement into/out cell
Physical and chemical behaviour
Larger molecules aren’t able to diffuse through phospholipid bilayer rely on facilitated diffusion (slower rate)
Polarity/change not able to use simple diffusion through phospholipid bilayer rely on facilitated (slower
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