Chapter 7 Flashcards


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1

Selective Permeability

allows substances to cross easily than others

2

Amphipathic

both a hydrophilic region andydrophobic

3

fluid mosaic model

the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids

4

phospholipid molecule

polar heads-glycerol and phosphate
fatty acid tails- fatty acid chains

5

osmosis

water through a membrane

6

dialysis

solute particles through a membrane

7

what does cholesterol do?

Cholesterol helps to stabilize the structure of the plasma membrane

8

what do phospholipids look like?

Phospholipids can be recognized by the presence of a head and two tails

9

Glycoprotein

is composed of both a carbohydrate and a protein.

10

Cell membranes are asymmetrical. Which of the following statements is the most likely explanation for the membranes asymmetrical nature?
A)Since the cell membrane forms a border between one cell and another in tightly packed tissues such as epithelium, the membrane must be a asymmetrical
B) Since cell membranes communicate signals from one organism to another, the cell membranes must be asymmetrical
C) The two sides of a cell membrane face different environments and carry out different functions.
D) Proteins only function on the cytoplasmic side of the cell membrane, which results in the membranes asymmetrical nature.

C