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Transport Across Cell Membranes notes for healthcare and medical student
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- GCSE
Transport Across Cell Membranes notes for healthcare and medical student
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Transport Across CellMembranes
The lipid bilayer is only permeable to small and nonpolar substances.
Oxygen and carbon dioxide are nonpolar gases that freely diffuse from their areas of higher
concentration to areas of lower concentration.
Steroid hormones have a cholesterol-based structure and are able to pass through cell membranes,
although more recent discoveries have demonstrated that even steroid hormones often make use of
a variety of protein channels and transporters.
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