Introduction to the Plasma Membrane (VCE SSCE Biology): Flashcards
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Plasma membrane function
Plasma membrane function
Controls what enters/exits cell; separates inside from outside
Selective permeability meaning
Selective permeability meaning
Membrane allows only specific substances through
Phospholipid structure parts
Phospholipid structure parts
Phosphate head (hydrophilic) + 2 fatty acid tails (hydrophobic)
Hydrophilic definition
Hydrophilic definition
Water-loving; attracted to and dissolves in water
Hydrophobic definition
Hydrophobic definition
Water-fearing; repels and insoluble in water
Amphipathic molecule meaning
Amphipathic molecule meaning
Has both hydrophilic and hydrophobic parts
Fluid mosaic model describes
Fluid mosaic model describes
Membrane components move freely; diverse molecules embedded
Cholesterol role in membrane
Cholesterol role in membrane
Regulates membrane fluidity at different temperatures
Saturated fatty acids structure
Saturated fatty acids structure
Only single bonds; straight chains that pack tightly
Unsaturated fatty acids structure
Unsaturated fatty acids structure
Have double/triple bonds; kinked chains, can't pack tightly