Unit 1 plasma membrane

plasma membrane

A selectively-permeable: only some substances can pass

phospholipid bilayer, described as a fluid mosaic, fluid: components of the cell can move around

mosaic: made of up of multiple parts.

cholesterol

regulates the spacing of the phospholipids so that they are not too close together

intergal proteins

proteins that pass through the lipid bilayer

- involved in transport of molecules across the membrane

- protein pumps and protein channels

peripheral proteins

loosely attached proteins on the outside of the bilayer

-aid in structural support

-speed up reactions by functioning as enzymes

- cell signalling

Glycolipids

A carbohydrate that is attached to a lipid

- cell recognition or communication

- cell-cell interactions

glycoprotein

a carbohydrate attached to a protein

- aids in cell signalling or communication.

-can function as receptors for hormones