CELL MEMBRANE.

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Plasma Membrane.

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Presentation transcript:

CELL MEMBRANE

The cell membrane is made of lipids Phospholipids Hydrophilic head Hydrophobic tails

Membrane is a lipid bilayer

Membrane is a lipid bilayer Allows membrane to interact with water inside and outside the cell

The cell membrane is fluid Constantly moving and flowing (video)

“Fluid mosaic” model Other molecules are attached to or embedded in the membrane.

“Fluid mosaic” model Other molecules are attached to or embedded in the membrane. Cholesterol – regulates how temperature affects membrane fluidity Peripheral proteins – membrane proteins that stick to the inside or outside of the membrane Integral proteins – membrane proteins that span the entire width of the membrane