ch 4 part 5 reviews

Question 1

Membrane surfaces have a “_____________” that identifies the cell

Answer 1

fingerprint

Question 2

fingerprint :

Answer 2

The combination of surface proteins and carbohydrates

Question 3

self marker____________label the body’s cell as friend and are tolerated by the immune system

Answer 3

MHC

Question 4

___________that immune recognize as foreign molecules :

Answer 4

antigen

Question 5

our body had ________marker that HIV binds to

Answer 5

CD4

Question 6

Cholesterol

call ass trol

chole sterol

Answer 6

Helps membranes
Prevent membranes from solidifying at low temperatures.
Hinder phospholipid movement in the moderate temperature

Question 7

Normal cell function depends on ________________ function

Answer 7

proper cell membrane

Question 8

Cystic fibrosis is

Answer 8

genetic condition

Question 9

What holds cells together in a multicellular organism?

Answer 9

CELL-CELL JUNCTIONS

Question 10

there are primary conncetions between animal cells :

Answer 10

-gap junction
-tight junction
-desmosome

Question 11

tight junction

Answer 11

form a water-tight seal between cells like
caulking around a tub

Question 12

desmosomes

Answer 12

act like velcro and fasten cell togather

Question 13

gap junction

Answer 13

act like a secret passageway and allow material to pass between cells

Question 14

How do molecules move across membranes?

Answer 14

cell membrane control movement out and in cell by
Selective Permeability
Passive Transport
Active Transport

Question 15

passive transport

Answer 15

is diffusion or movement of particle (solute) from an area has high concentration to an area has lower concentration
does not require energy

Question 16

cell membrane are __________

Answer 16

selectivly permable
allow things to pass and not others

Question 17

from an area has high concentration to an area has lower concentration called

Answer 17

concentration gradient

Question 18

passive transport method :

Answer 18

-solute like food coloring dropped into solvent such as water
-food-coloring molecules move about randomly and bumping into each other
-the random moton of the molecules end up evenly distributed

Question 19

There are two types of passive diffusion:

Answer 19

Simple diffusion
Facilitated diffusion

Question 20

Diffusion of molecules directly through the cell membrane

Answer 20

simple diffusion

Question 21

Diffusion of molecules across the cell membrane
channel or carrier molecules

Answer 21

Facilitated diffusion

Question 22

example on faciliated diffusion :

Answer 22

oxygen diffuse left
carbon dioxide diffuse right