Osmosis

Question 1

what is osmosis?

Answer 1

diffusion of H2O occuring across a membrane of some sort

Question 2

define diffusion

Answer 2

mvmt of a substance from an area of high concentration to an area of low concentration

Question 3

what is the difference between two points (across a membrane called)

Answer 3

concentration or density gradient

Question 4

define viscosity

Answer 4

how easily the liquid flows

Question 5

how does temp affect osmosis/diffusion?

Answer 5

warmer liquids move faster

warmer membranes are more permeable

Question 6

how does size of molecule affect diffusion?

Answer 6

larger molecules may not fit through the membrane pores

Question 7

how does water move in osmosis?

Answer 7

from an area of LOW concentration of solute to an area of HIGH concentration of solute
OR
from an area of HIGH concentration of water to an area of LOW concentration of water

Question 8

what is the difference between solute and solvent

Answer 8

solute is what is dissolved in the solvent

Question 9

water moves from an area of ______ concentration of water to an area of ______ concentration of water

Answer 9

from high to low

Question 10

water moves from an area of ______ concentration of solute to an area of _______ concentration of solute

Answer 10

from low to high

Question 11

solute + solvent

Answer 11

solution

Question 12

define osmotic pressure

Answer 12

the force required to prevent water from moving across a membrane by osmosis

Question 13

what type of solution has the same concentration of particles?

Answer 13

isosmotic

Question 14

what type of solution has a greater concentration of solutes (compared to the solution on the inside of the membrane)?

Answer 14

hyperosmotic

Question 15

what type of solution has a lesser concentration of solutes (compared to the soln inside the membrane)?

Answer 15

hyposmotic

Question 16

RBC in a hypotonic solution will

Answer 16

lyse

Question 17

RBC in a hypertonic solution will

Answer 17

shrivel/dehydrate/CRENATION

Question 18

tonicity terms refer to H2O mvt with regard to

Answer 18

cells

Question 19

in an isotonic soln the cell

Answer 19

neither shrinks nor swells

Question 20

in a hypertonic soln the cell

Answer 20

will shrink because water moves out of the cell

Question 21

in a hypotonic soln, the cell

Answer 21

will swell (possible lysis) because water moves into the cell

Question 22

in an osmosis problem, at time zero, what is named?

Answer 22

osmolarity

Question 23

in an osmosis problem what is named 2nd?

Answer 23

tonicity

Question 24

with non diffusable solute, the tonicity prefix is the same as the

Answer 24

osmolarity prefix

Question 25

what is the molarity of cytoplasm

Answer 25

0. 3 M of any non salt (like gl or starch)

0. 16 M of NaCl

Question 26

what is the percent of normal NaCl in cytoplasm?

Answer 26

0.9%