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Flashcards in Plasma Membrane Deck (18):
0

Fluid mosaic model

-membrane is made up of phospholipids
-negatively charged polar head groups
-proteins are in the membrane
-cholestoral adds rigidity

1

Membrane proteins

Transmembrane protein
Integral membrane protein
peripheral membrane protein

2

Transmembrane protein

-a protein that spans the membrane
-it crosses the entire membrane
-contrasts the integral membrane protein

3

Integral membrane protein

-doesnt span the entire membrane
-has a hydrophobic region that anchors it to the phospholipid bilayer
-has polysaccharides associated with it

4

Peripheral membrane protein

-associated with the membrane
-not anchored in the membrane, it could move across it

5

Transmembrane protein examples

-channel proteins
-carrier proteins
-porins

6

Plasma membrane separates

-inside of the cell from the outside of cell

7

Pemeability of the membrane

-permeable to small polar molecules and hydrophobic molecules
----o2 oxygen lipids some hormoes go by diffusion
-large charged or polar molecules cant pass

8

Channel proteins

-form a barrel in the membrane and allows ions in and out
-really specific at whats allowed to pass through and whats not

9

Carrier proteins

-carries things across
-they bind and cause a conformational change

10

Porins

-giant hole in the membrane

11

What is the point of glycosylating proteins in the rough ER and golgi

-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

Adhesion proteins

-gap junctions
-tight junctions
-desmedones

13

Gap junctions

-allow the exchange of nutrients and cell to cell communication

14

Tight junctions

-completely encircle cells and adhere to the cells around it
-makes it really tight between cells so nothing could pass through

15

Desmesomes

-give mechanical strength
-in skin cells

16

Plasma desmoda

Specifically between plant cells
-open channels allowing exchange of nutrients in plant cells

17

Glycocalix

-carbohydrate/polysaccharide coating around a cell