Plasma Membrane Flashcards
0
Q
Membrane proteins
A
Transmembrane protein
Integral membrane protein
peripheral membrane protein
1
Q
Fluid mosaic model
A
- membrane is made up of phospholipids
- negatively charged polar head groups
- proteins are in the membrane
- cholestoral adds rigidity
2
Q
Transmembrane protein
A
- a protein that spans the membrane
- it crosses the entire membrane
- contrasts the integral membrane protein
3
Q
Integral membrane protein
A
- doesnt span the entire membrane
- has a hydrophobic region that anchors it to the phospholipid bilayer
- has polysaccharides associated with it
4
Q
Peripheral membrane protein
A
- associated with the membrane
- not anchored in the membrane, it could move across it
5
Q
Transmembrane protein examples
A
- channel proteins
- carrier proteins
- porins
6
Q
Plasma membrane separates
A
-inside of the cell from the outside of cell
7
Q
Pemeability of the membrane
A
- permeable to small polar molecules and hydrophobic molecules
- —o2 oxygen lipids some hormoes go by diffusion
- large charged or polar molecules cant pass
8
Q
Channel proteins
A
- form a barrel in the membrane and allows ions in and out
- really specific at whats allowed to pass through and whats not
9
Q
Carrier proteins
A
- carries things across
- they bind and cause a conformational change
10
Q
Porins
A
-giant hole in the membrane
11
Q
What is the point of glycosylating proteins in the rough ER and golgi
A
- play a big role in signaling
- on the exterior of the cell receptors
- a way of getting a signal from outside the cell to inside the cell
12
Q
Adhesion proteins
A
- gap junctions
- tight junctions
- desmedones
13
Q
Gap junctions
A
-allow the exchange of nutrients and cell to cell communication
14
Q
Tight junctions
A
- completely encircle cells and adhere to the cells around it
- makes it really tight between cells so nothing could pass through
