A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group.
A phospholipid Bilayer is an arrangement of two layers of phospholipids with their tails pointing inward.
Nutrients, such as sugars or amino acids, must enter the cell, and certain products of metabolism must leave the cell. Such molecules diffuse passively through protein channels.
Another lipid composed of four fused carbon rings, is found alongside phospholipids in the core of the membrane.
Integral Membrane Protein
Have at least one hydrophobic region that anchors them to the hydrophobic core of the phospholipid bilayer. Some stick only partway into the membrane, while others stretch from one side of the membrane to the other and are exposed on either side.
Lipid with Carbohydrate attached
Protein with Carbohydrate attached
"Water loving" part of a phospholipid - Allows water to pass
"Water Hating" Part of the Phospholipid - Repels water to stay