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1

attached toeither the inner or outer surfaces of the lipid bilayer

 peripheral, or extrinsic, proteins

2

suggests that the plasma membrane is neither rigid norstatic in structure but is highly flexible and can change its shapeand composition through time

fluid mosaic model

3

protein molecules, penetratedeeply into the lipid bilayer,

integral, or intrinsic, proteins, 

4

movement of solutes from an area of higher soluteconcentration to an area of lower solute concentration

diffusion

5

results when a partition containing small holes isplaced in a stream of moving liquid

filtration

6

the processby which transport proteins mediate, or assist in, the movementof large, water-soluble molecules or electrically charged moleculesor ions across the plasma membrane.

mediated transport

7

literally means cell-eating( figure 3.23 ) and applies to endocytosis when solid particles areingested and phagocytic vesicles are formed.

phagocytosis

8

internalization of substances,includes both phagocytosis and pinocytosis and refers to theuptake of material through the plasma membrane by the formationof a vesicle.

endocytosis

9

involves the active transport of an ion,such as sodium, out of a cell, establishing a concentration gradient,with a higher concentration of the ions outside the cell

secondary active transport

10

Thesesecretory vesicles then move to the plasma membrane, where themembrane of the vesicle fuses with the plasma membrane and thecontent of the vesicle is expelled from the cell. 

exocytosis

11

– charge difference across the plasma membrane caused by the regulation of ion movement by cells-outside of plasma membrane is positively charged

Membrane potential 

12

surrounds the heart -contains pericardial fluid-located between the visceral pericardium and the parietal pericardium

pericardial cavity

13

surrounds each lung, which is covered by visceral pleura - lies between the visceral pleura and the parietal pleura and contains pleural fluid

pleural cavity

14

limits the movement of phospholipids, providing stability to the plasma membrane

cholesterol

15

cell surface molecules that allow cells to identify one another or other molecules

marker molecules

16

allow cells to attach to other cells or to extracellular molecules

attachment proteins

17

integral proteins that allow ions or molecules to move from one side of the plasma membrane to the other

transport proteins

18

one or more integral proteins arranged so that they form a tiny channel through the plasma membrane 

transport proteins

19

channel proteins that are always open responsible for the permeability of the plasma membrane to ions when the plasma membrane is at rest 

non-gated ion channel

20

channel proteins that can be open or closed 

gated ion channel

21

open or close in response to chemical signals or ligands ( small molecules that bind to the proteins or glycoprotein)receptor on the surfacerequires a ligand (a chemical like acetycholine) 

ligand-gated ion channel

22

open or close when there is a change in charge across the plasma membrane. -muscles or nerves

voltage-gated ion channel

23

integral membrane proteins that move ions or molecules from one side of the plasma membrane to the other-have specific binding sites to which ions or molecules attach on one side of the plasma membrane-change shape to move the bound ions or molecules to the other side of the plasma membrane, where they are released

Carrier proteins or transporters 

24

transmembrane proteins that are not really open, but can flip-They do not have a channel-transport non-lipid soluble substances

Transporters 

25

the movement of one specific ion or molecule across the membrane

uniport

26

movement of two different ions or molecules in the same direction across the plasma membrane  

Symport/ Cotransport- 

27

 movement of two different ions or molecules in opposite directions across the plasma membrane 

Antiport - 

28

transport proteins that move specific ions and molecules from one side of the plasma membrane to the other-movement is fueled by ATP breakdown

ATP powered pumps

29

proteins or glycoproteins in the plasma membrane with an exposed receptor site on the outer cell surface, which can attach to specific chemical signals

Receptor proteins - 

30

catalyze chemical reactions on either the inner or the outer surface of the plasma membrane

Enzymes – 

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