Cell membrane Flashcards
1
Q
what is another name for the ubiquitous cell membrane
A
unit membrane
2
Q
what is a phospholipid formed from
A
a neutral fat in which one of the fatty acid groups on the glycerol moiety is replaced by a phosphate group
3
Q
what is the basic function of the phospholipid bilayer:
A
separate 2 aqueous compartments
4
Q
what is in the outer leaflet of the phospholipid bilayer
A
cholesterol
phosphatidylcholine
phosphatidylehtanolamine
sphingomyelin
5
Q
what is in the inner leaflet of the phospholipid bilayer
A
cholesterol
phosphatidylethanolamine
phosphatidylserine
phosphatidylinositol
6
Q
characteristics of glycolipids
A
- found only in outer leaflet with carb. portion facing the EM
- fatty acid tail is coupled via sphingosine to a carb head group
- create a cell coat involved in cell-to-cell interactions and conveys antigenicity
7
Q
characteristics of glycocalyx
A
- not an integral part of the membrane
- carb coat on the extracellular surface of the cell membrane composed of Carb portions of the glycolipids and glycoproteins
