Cell membrane

Provides a semipermeable separation between cell components, the organelles, and surrounding environment.

All cell membranes have negative charges (zeta potential) which makes it difficult for two cells to come close together. 

The cytoplasmic membrane maintains the cellular integrity of the cells interior by controlling and influencing the passage of materials in and out of the cell.

The cytoplasmic membrane, the outer membrane defines the cells boundary.

The membrane consists of proteins, phospholipids, cholesterol, and polysaccharides,

The cell membrane is a dynamic fluid structure with proteins floating in lipids.

The lipid in the cell membrane is bilayered phospholipid.

The charged end of the phospholipid, the phophate end, is oriented toward the inner and outer surfaces.

The fatty acid end, the nonpolar end, points towards each other in the interior of the mebrane.

Proteins may be incorported into the lipid bilayer, or into the inner or outer periphery surface of the membrane.

Polysaccharides either as glycoproteins or glycolipids can attach to the lipid or ptotein moleculaes of the membrane.

The lipid bilayer of the membrane is impermeable to most water soluble molecules.

Cell membrane proteins can transfer polar and non-lipid soluble substances.

Cell membrane protein determine the shape and structure of the membrane by attaching to underlying microfilaments and microtubules.

Carbohydrates bind to the membrane and act as surface antigens allowing cell recognition and interaction between cells.

The cytoplasmic membrane’s processes include osmosis, diffusion, active transport and endocytosis.

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