Cell membranes
Practice notes · page 1
The phospholipid bilayer is the basic structure of the cell membrane.
The hydrophilic heads face the aqueous environments. Their hydrophobic tails face inward, away from water.
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How a membrane keeps its balance
Lecture notes · Membrane transport
Simple diffusion moves molecules down their concentration gradient without requiring cellular energy.
The phospholipid bilayer creates the boundary. Its hydrophilic heads face the aqueous environments; its hydrophobic tails face inward.
Simple diffusionSelected passage · page 2
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Selected passagesimple diffusion
Down a concentration gradient · no cellular energy required
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The phospholipid bilayer is the basic structure of the cell membrane.
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Cell biology · Included practice notes
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Cell membrane
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