other

Question 1

what is the defenition of water potential?

Answer 1

describe the tendency of water molecules to move from a high to low concentration

Question 2

osmosis defenition

Answer 2

passage of water from a region of high water potential to a region of lower water potential through partially permeable membrane

Question 3

difference between osmosis and diffusion (2)

Answer 3

osmosis is water molecules only through a permeable membrane

Question 4

what is just the trident symbol

Answer 4

water potential

Question 5

trident with p meaning

Answer 5

pressure potential

Question 6

trident with s meaning

Answer 6

solute potential

Question 7

water potential of pure water

Answer 7

zero

Question 8

at high conc of water mols water has what type of energy

Answer 8

greater potential enegry

Question 9

what lowers water potential of a solution

Answer 9

adding solutes

Question 10

how does solutes reduce water potential

Answer 10

when dissolved in water tjere are proportionally fewer water mols to move about

Question 11

are all water potentials negative or positibe

Answer 11

negative

Question 12

what is a concentrated solution

Answer 12

more solutes dissolved in it

Question 13

what does it mean the more negative the water potential is

Answer 13

fewer free water molecules there are

Question 14

defenition of water potential

Answer 14

tendency of water to move into a system

Question 15

in a diagram of circles where of 0 and -10 kPa where would the arrow go

Answer 15

from 0 to -10

Question 16

what lowers plant cells water potential

Answer 16

presene of solute molecules in the vacuole

Question 17

what type of number is pressure potential

Answer 17

usually positive

Question 18

connection between Ψp and Ψs

Answer 18

Ψp decreases, Ψs increases

Question 19

what does it mean when Ψs increases

Answer 19

becomes less negative

Question 20

what does it mean when Ψs becomes less negative

Answer 20

water not drawn in

Question 21

what is the water potential equal to

Answer 21

solute potential and pressure potential

Question 22

Ψcell meaning

Answer 22

water potential

Question 23

which way does water move in a hypertonic solution?

Answer 23

out of the cell

Question 24

what happens in a hypertonic solution

Answer 24

plamolysis in plant cells

Question 25

what is incipient plasmolysis

Answer 25

only half cells have plasmolysisied

Question 26

movement in a isotionic medium

Answer 26

non net movement

Question 27

Ψp inn plant cells in a isotonic medium

Answer 27

0

Question 28

how do plant cells in isotonic medium look like

Answer 28

flaccid

Question 29

how do plant cells in hypertonic medium look like

Answer 29

flaccid

Question 30

water movement in hypotonic medium

Answer 30

move into the cell

Question 31

how will plant cells look like in hypotonic external medium

Answer 31

turgid

Question 32

defenition of hypotonic

Answer 32

low conc of solute higher water potential

Question 33

defenition of hypertonic

Answer 33

high conc of solute lower water potential

Question 34

isotonic defenition

Answer 34

same solute concentration as inside cell same water potential as inside the cell

Question 35

what is the defenition of a turgid cell

Answer 35

firm cell as a result of cell content pushing against cell wall

Question 36

how can you make a cell turgid

Answer 36

putting it in water which is hypotonic

Question 37

defenition of turgid

Answer 37

fully turgid plant cells hold as much water as possible no more water can enter as cell wall cant expand further

Question 38

defenition of plasmolysis

Answer 38

when water leave a plant cell by osmosis the cytoplasm and vacuole shrink and cell membrane pulls away from the cell wall

Question 39

osmosis with surcose in 0.2M

Answer 39

water enters potato cells down a water potential gradient

Question 40

osmosis with surcose in 0.5M ( where the line crosses 0 mass change)

Answer 40

no change water potential either side is equal non net moevment incipient plasmolysis

Question 41

osmosis with sucrose concentration of 1.0 mol

Answer 41

decrease in mass is caused by water leaving potato cells down conc gradient

Question 42

4 types of bulk transport

Answer 42

endocytosis exocytosis pinocytosis phagocytosis

Question 43

pinocytosis defenition

Answer 43

uptake of large molecules from solution by endocytosis

Question 44

phagocytosis defenition

Answer 44

uptake of solid particles by a cell

Question 45

what is endocytosis

Answer 45

large partiles enter cells by endocytosis cell membrane engulfs particles forming vesicle which enters cytoplasm

Question 46

3 steps for endocytosis

Answer 46

1 - plasma membrane folds inwards 2 - plasma membrane engulfs the material 3 - plasma membrane fuses to enclose the material

Question 47

what are the 2 types of endocytosis

Answer 47

pinocytosis phagocytosis

Question 48

whhat is exocytosis

Answer 48

opposite of endocytosis

Question 49

3 factors which affect fludiity of the membrane?

Answer 49

heat ethanol pH

Question 50

factors which affect gas exchange by diffusion

Answer 50

Surface area Diffusion distance Diffusion gradient

Question 51

how to get gas exchange by diffusion to be most effective

Answer 51

Surface area of the surface increases Diffusion distance decreases Diffusion gradient becomes more steep