3.2 Osmosis

Question 1

compound

Answer 1

a substance formed by the chemical combination of two or more elements in fixed proportions

Question 2

partially permeable membranes

Answer 2

a membrane ( very thin layer) that lets some particles move through it but prevents others passing through

Question 3

osmosis

Answer 3

the diffusion of water molecules through a partially permeable membrane

Question 4

osmosis ( in terms of water potential)

Answer 4

the net movement of water molecules from a region of higher water potential ( dilute solution ) to a region of lower water potential ( concentrated solution) through a partially permeable membrane

Question 5

high water potential

Answer 5

an area where there are a lot of water molecules- dilute solution

Question 6

low water potential

Answer 6

an area where there are a lot of water molecules - a concentrated solution

Question 7

water potential gradient

Answer 7

a difference in water potential between two areas

Question 8

turgid

Answer 8

a description of a plant cell that is tight and firm

Question 9

turgor pressure

Answer 9

the pressure of the water pushing outward on a plant cell wall

Question 10

flaccid

Answer 10

a description of a plant cell that is soft

Question 11

plasmolysed

Answer 11

a description of a cell in which the cell membrane tears away from the cell wall