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STH2203 LU1:INTRODUCTION (:<3: Animal & Environment (:<3: Occurs…
STH2203 LU1:INTRODUCTION
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Selective Permeability
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:explode: Water-soluble substances - Glucose (help of transport proteins to move between extracellular fluid and cytoplasm)
:explode: Small uncharged molecule - H2O, CO2, O2. NH3 (directly pass through)
:explode: Ions - Sodium, Potassium (help of transport proteins to move between extracellular fluid and cytoplasm)
:explode: Large macromolecules transported in bulk through endocytosis or exocytosis.
E.g. Pathogens and Enzymes
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