Chapter 4 -6 Flashcards Preview

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Flashcards in Chapter 4 -6 Deck (10):
1

What is the function of the plasma membrane?

control activity at the cell's periphery
intercepts cell signals
controls the flux of molecules and ions

2

Permeability descreases with?

longer FA tails
saturated FA tails

3

What is the structure of the plasma membrane?

The fluid mosaic model
- phospholipid bilayer is main component

4

What helps the phospholipid bilayer form a stable bilayer?

nonpolar/polar regions

5

Phospholipids have?

free lateral movement

6

Fluidity is increased by?

cholesterol (inhibits permeability)
unsaturated FA's

7

Mosaic?

proteins make the bilayer function

8

What are integral proteins?

Transport proteins
Adhesion ""
Enzymes
Receptor ""
Recognition ""

9

What doe receptor proteins do?

respond to chemical messages
- a signal binds to a receptor and changes the cells activity

10

Recognition proteins?

major histocompatability molecules