Cell Membrane OR Plasma Membrane Its the same

Cell Membrane OR Plasma Membrane It’s the same thing BRUHHH!!!!!!

Plasma Membrane Surrounds Also the cell; forms the boundary of the cell Called- Selectively Permeable or Semipermeable membrane: allows ONLY certain molecules or ions to pass IN and OUT of the cell

3 Cell Membrane Structure Cell membrane is made of 3 Macromolecules: Lipids Proteins Carbohydrates

Cell Membrane Structure: Lipids Primarily made of Lipids of a double layer of phospholipids known as a “phospholipid bilayer. ” Made Contains cholesterol

Cell Membrane Structure: Protein Made Two of proteins types of proteins in the bilayer are: Peripheral proteins are attached on the surface (inner or outer) and aid in cell recognition (outer ones).

Cell Membrane Structure Integral proteins form channels that passes through the membrane to connect the inside of the cell with the outside.

Carbohydrates Recognize “self” Carbohydrates are linked to proteins forming glycoproteins or lipids forming glycolipids. Glycoproteins and glycolipids both have carbohydrate tails that act as markers for cell recognition and holds the cell together (sites for attachment)

3 Basic Parts of a Phospholipid 3 Basic Parts of Phospholipid Charged phosphate group Glycerol Two fatty acid chains

Polar Head Made up of a glycerol and a phosphate group. Charge on the phosphate group makes hydrogen bonding possible between the polar head and water molecules. Hydrophilic – “water-loving”

Nonpolar Tail Made up of two fatty acid chains. Nonpolar means “no charge” so the fatty acid chains cannot form hydrogen bonds with water molecules. Hydrophobic –“water-fearing”

Phospholipid Bilayer Arrangement Hydrophilic polar heads face out and interact with water. Hydrophobic tails face towards each other. Fluid Mosaic Modelphospholipid bilayer creates a sea in which molecules can float and move around in memebrane DRAW & LABEL

Which part of the cell membrane is nonpolar?

16 Cell Membrane Function Helps maintain homeostasis (stable internal environment) Controls Forms the passage of materials IN & OUT of a cell. a boundary between cell & the outside environment. Provides protection from the surrounding environment and support the materials inside cell.

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