Chapter 2: Membranes and Molecular Transport

Question 1

is protein water-soluble or insoluble?

Answer 1

water soluble

Question 2

what do transmembrane proteins do?

Answer 2

they allow non fat solubles to go from inside the cell to outside the cell

Question 3

what do receptor proteins allow?

Answer 3

cell communication

Question 4

what is the job of an enzyme?

Answer 4

to speed up the rate of a reaction

Question 5

which drugs affect ion channels/

Answer 5

antihypertensive, diuretics, and muscle relaxants

Question 6

is cholesterol water-soluble or insoluble?

Answer 6

water soluble

Question 7

is cholesterol water-soluble or insoluble?

Answer 7

water soluble

Question 8

what does water soluble mean?

Answer 8

able to be dissolved in water

Question 9

do all cell membranes have cholesterol?

Answer 9

yes

Question 10

characteristics of passive transport

Answer 10

molecules go with the concentration gradient. the smaller the gradient, the slower it goes.

Question 11

can an ion be lipid soluble with a charge?

Answer 11

no

Question 12

can an ion be lipid soluble with a charge?

Answer 12

no

Question 13

non polar molecule means…

Answer 13

electrons are shared equally. ex: oxygen

Question 14

polar molecules means..

Answer 14

electrons are not shared equally. ex: water and ions. most polar molecules are not lipid soluble

Question 15

is there a barrier in diffusion?

Answer 15

no

Question 16

does osmosis have a barrier?

Answer 16

yes

Question 17

what crosses the permeable membrane in osmosis

Answer 17

only water, protein molecule cant cross the membrane. osmosis is water moving with its gradient.

Question 18

definition of hypertonic

Answer 18

the solution has more hyper solutes, meaning it’ll shrink

Question 19

definition of isotonic

Answer 19

same amount of solutes on both sides, so the cell shape remains the same

Question 20

definition of hypotonic

Answer 20

solution has fewer solutes, this can cause the cell to swell or burst

Question 21

why do we care about hypotonic, isotonic, and hypertonic solutions?

Answer 21

because we don’t want to loose or gain volume, we want the same level of solutes with no net gain or loss

Question 22

what is the force of filtration

Answer 22

hydrostatic pressure (blood pressure)

Question 23

what does filtration filter

Answer 23

any molecule small enough to filter out

Question 24

why do we get wrinkly after being in the swimming pool for too long?

Answer 24

we have extra skin because we’ve gained water.

Question 25

why do we feel tight after swimming in the ocean

Answer 25

we lost water because our surroundings are salty