Structure of the Cell Membrane (AQA A-Level Biology): Flashcards
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Phospholipid structure
Phospholipid structure
Hydrophilic head + 2 hydrophobic fatty acid tails
Phospholipid bilayer arrangement
Phospholipid bilayer arrangement
Heads face water, tails cluster inside away from water
Transmembrane proteins
Transmembrane proteins
Proteins extending completely across the bilayer
Carrier protein function
Carrier protein function
Transport molecules (glucose/amino acids) across membrane
Cholesterol role in membrane
Cholesterol role in membrane
Adds mechanical strength & regulates fluidity
Glycolipid composition
Glycolipid composition
Carbohydrate group attached to lipid molecule
Glycoprotein main function
Glycoprotein main function
Cell-surface receptors for hormones & neurotransmitters
Selective permeability meaning
Selective permeability meaning
Membrane controls which substances can enter/exit cell
Fluid aspect of fluid-mosaic model
Fluid aspect of fluid-mosaic model
Phospholipids move relative to each other within layer
Mosaic aspect of fluid-mosaic model
Mosaic aspect of fluid-mosaic model
Proteins embedded in different shapes, sizes & positions