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Fluid Mosaic Model
A model that refers to how the lipid bilayer tends to act more like a liquid than a solid and contains a number of different components.

TERM
Glycolipid
DEFINITION
Phospholipid with an attached sugar chain. Maintains stability of the membrane and facilitates cell-cell interactions.

TERM
Glycoprotein
DEFINITION
A protein with an attached sugar chain. Act as ID tags which give each cell its identity.

TERM
Cholesterol
DEFINITION
Steroid molecule helps stabilize the plasma membrane and prevent the phospholipid molecules from "sticking" together.

TERM
Phospholipid
DEFINITION
A molecule that has a hydrophilic phosphate head and a hydrophobic lipid tail.

TERM
Hydrophobic
DEFINITION
Water fearing (non-polar). substances that will not mix with water.

TERM
phospholipid bilayer
DEFINITION
A two-layered arrangement of phosphate and lipid molecules that form a cell membrane, the hydrophobic lipid ends facing inward and the hydrophilic phosphate ends facing outward.

TERM
Hydrophilic
DEFINITION
Water loving (polar), molecules that are able to dissolve in water

Channel proteins
Proteins that provide passageways through the membrane for certain hydrophilic (water-soluble) substances such as polar and charged molecules.

Carrier proteins
Proteins that bind solutes and transport them across the plasma membrane

Receptor proteins
Proteins that transmit information in and out of cells. They allow communication between cells.
These proteins have shapes that allow only specific molecules to bind to them.

TERM
carbohydrate chain
DEFINITION
Form distinctive cellular markers allowing cells to recognize one another.

TERM
integral membrane proteins
DEFINITION
A protein embedded in the lipid bilayer of a cell. These are typically cell surface receptors, channels, or pumps.

TERM
peripheral membrane proteins
DEFINITION
Proteins associated with but not embedded within the plasma membrane.

TERM
transmembrane proteins
DEFINITION
Integral proteins that span the membrane.
