Cell Membrane Structure. Selective Permeability Ability to maintain homeostasis within the cell by regulating the passage of materials into and out of.

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Presentation transcript:

Cell Membrane Structure

Selective Permeability

Ability to maintain homeostasis within the cell by regulating the passage of materials into and out of the cell

Discovery S. Singer and G. Nicolson in 1972 FLUID MOSAIC MODEL

Lipid Bilayer PHOSPHOLIPID main molecule of membrane

Lipid Bilayer CHOLESTEROL adds strength & prevents freezing

Protein Types marker, receptor, transport & enzymes

Membrane Diagram

Enzymes Speed up important chemical reactions to produce cell energy molecules and perform photosynthesis in plants

Marker Proteins identification called antigens blood type & immunity

Receptor Proteins receive signals from hormones and neurotransmitters immunity (antibodies)

Transport Proteins channels & pumps nerve signal conduction & muscle contraction

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