Cell Membrane In Depth

Question 1

Cell membrane also called the

Answer 1

plasma membrane

Question 2

cell membrane is made up of

Answer 2

phosopholipids, proteins, sugars, and cholesterol

Question 3

fluidity

Answer 3

parts of the membrane able to move around

Question 4

steroids

Answer 4

another type of lipid even though they look different

Question 5

steroids are

Answer 5

nonpolar

Question 6

cholesterol

Answer 6

a steroid that helps maintain the structure of an animal cell membrane

Question 7

Proteins play

Answer 7

a variety of roles in the cell membrane

Question 8

receptors

Answer 8

protein function

receiving signals

Question 9

transport proteins

Answer 9

protein function

move molecules across the membrane

Question 10

channels

Answer 10

protein function

act as doorways

Question 11

glycoproteins

Answer 11

protein function

act as ID tags

Question 12

Prokaryotes and plants DO NOT

Answer 12

have cholesterol in their cell membranes

Question 13

molecules are always

Answer 13

moving

Question 14

molecules can move at different speeds depending on

Answer 14

phase and temperature

Question 15

Concentration Gradient

Answer 15

unequal distribution of particles in a given space

Question 16

equilibrium

Answer 16

molecules will move until they achieve equilibrium. it is the equal distribution of particles in a given space

Question 17

passive transport

Answer 17

does not require energy
movement of molecules from high to low trans
purpose: equilibrium
types: diffusion, osmosis, facilitated diffusion

Question 18

diffusion

Answer 18

the movement of ANY particle from high to low concentration

Question 19

osmosis

Answer 19

the movement of WATER from high to low concentration across a membrane

Question 20

hypotonic

Answer 20

less solute outside (more water)

Question 21

isotonic

Answer 21

equal concentration of solute

Question 22

hypertonic

Answer 22

more solute outside

less water

Question 23

water always moves from

Answer 23

hypo to hyper

Question 24

why do animal cells explode when plant cells dont during hypotonic

Answer 24

plant cell walls allow it not to burst

Question 25

facilitated diffusion

Answer 25

movement of particles from high to low concentrations across the cell membrane with the aid of special membrane transport proteins