OSMOSIS

Question 1

definition of osmosis

Answer 1

movement of water molecules from an area of higher water potential to an area of lower water potential through a selectively permeable membrane

Question 2

what is water potential measured in

Answer 2

kilopascals

Question 3

what happens to water potential when a solute is added to pure water

Answer 3

lowers its water potential

Question 4

what is a hypotonic solution

Answer 4

more water and less solute

Question 5

what is a hypertonic solution

Answer 5

less water and more solute

Question 6

what happens to a cell in pure water

Answer 6

animal cell - will eventually burst (haemolysed)
plant cell - cytoplasm and vacuole will push against the cell wall which stops the cell from getting any larger (turgid)

Question 7

what happens to a cell in sugar solution

Answer 7

animal cell - cell content shrinks and membrane wrinkles (flaccid / crenated)
plant cell - cytoplasm and vacuole shrink and membrane pulls away from cell wall (plasmolysed)