Unit 5: Diffusion and osmosis

Question 1

What is diffusion?

Answer 1

movement of particles so that they spread out into avaible space
try to go to equilibrium

Question 2

Diffusion, how does it process and which way does it move

Answer 2

passive and slow process
move from [high] to [low]
[] = concentration

Question 3

define: permeable, semi permeable, impermeable

Answer 3

particles go through always
particles somewhat get through
particles never get through

Question 4

particles relationship to other particles

Answer 4

particles diffuse independent from other particles

Question 5

What bonds/particle size is fast diffusion and slow/no diffusion

Answer 5

fast diffusion: non-polar small (hate water, hydrophobic)
polar small
slow: big polar
no diffusion: ions(charged )

Question 6

Electrical gradient vs.

chemical gradient

Answer 6

electrical gradient: difference in charge across a membrane ex. na+ on one side and - on other side

chemical gradient: difference in concentration across a membrane ex. high vs low []

Question 7

How does the movement differ if the gradients are moving in the same direction vs opposite direction

Answer 7

same direction= more movement

diff. direction= less movement

Question 8

Osmosis

Answer 8

Diffusion(movement of particles so that they spread out into avaible space) of water

Question 9

H2O is a party animal what are 2 things that it will do

Answer 9

goes to highest solute concentration and follow solute

Question 10

define osmolarity

Answer 10

concentration of dissolved H2O attracting particles
describes the total concentration of solutes in a solution
(ex. 1 mole glucose and 1 mole MgCl2= 4 OsM)

Question 11

Osmolarity is before or after situation

Answer 11

Before

Question 12

hypoosmotic means

Answer 12

lower solute concentration

Question 13

isosmotic means

Answer 13

equal solute concentration

Question 14

hyperosmotic means

Answer 14

higher solute concentration

Question 15

Osmolarity before situation what is being compared

Answer 15

fluids, intra cellular fluid and extra cellular fluid

Question 16

Define Tonicity

Answer 16

affect of solution on the cell

the ability of a solution surrounding a cell to cause that cell to gain or lose water

Question 17

tonicity is before or after situation

Answer 17

after

Question 18

hypertonic means

Answer 18

cell shrinks raisin

Question 19

hypotonic means

Answer 19

cell swells

Question 20

isotonic means

Answer 20

no change in cell

Question 21

plants love what tonicity

Answer 21

hypotonic

Question 22

animals love what tonicity

Answer 22

isotonic

Question 23

Does diffusion, osmosis and tonicity require energy?

Answer 23

No

Question 24

gradient means

Answer 24

different across the membrane