osmosis

Question 1

define solvent

Answer 1

a liquid that dissolves liquids

Question 2

define solute

Answer 2

solid that dissolves in a liquid

Question 3

define solution

Answer 3

liquid containing dissolved solutes

Question 4

define osmosis

Answer 4

net movement of water molecules from an area of high water potential to an area of low water potential across a semi-permeable membrane

Question 5

value of pure water

Answer 5

0kPa

Question 6

salt solution value

Answer 6

-20kPa

Question 7

water moves into cell what way does the conc gradient go

Answer 7

water moves by osmosis down a concentration gradient

Question 8

what is it called when an animal cell bursts open due to osmotic shock and why does this happen

Answer 8

haemolysed
it has no cell wall to support it and stop it

Question 9

what is it called when cell membrane pushes against cell wall

Answer 9

cell becomes turgid

Question 10

mps for a plasmolysis cell

Answer 10

water leaves cell by osmosis
cell membrane pulls away from cell wall
making cytoplasm shrink

Question 11

define isotonic

Answer 11

same water potential inside and outside cell

Question 12

define hypotonic

Answer 12

water potential is higher outside cell than inside

Question 13

define hypertonic

Answer 13

water potential is lower outside cell than inside

Question 14

what does an isotonic solution do to a cell

Answer 14

make is flaccid

Question 15

what does a hypertonic solution do to a cell

Answer 15

make it plasmolysed

Question 16

what does a hypotonic solution do to a cell

Answer 16

makes cell turgid