Flashcards in Lab 4 Deck (28)
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1
at cellular level, water transport is influenced by -- and --
relative pressure and [solute] in water
2
energy content of water expressed as --
water potential (pressure potential and solute potential)
3
water potential is expressed in units of -- and at 20C
pressure
4
pressure potential in water solution is relative to the atmospheric pressure which is 1 bar (0.1 MPA) near --
sea level
5
movement of water into cell does not increase in cell size but in --
pressure (turgor)
6
cell solute potentials are --
-2.4 MPa
7
dissolved solutes in water -- energy or solute potential
decreases
8
[solute] are expressed in terms of osmolarity which is the sum of -- of all dissolved species in the solution
[molar]s
9
1 M KCl solution in which KCl completely dissociates into K+ and Cl- ions = -- osmolar solution
2
10
water will move from the higher to lower water potential until an equilibrium situation is established in which the -- inside and outside the cell are equal
solute potential
11
plans usually have -- internal pressure than their surrounding medium
higher (turgor)
12
leaves which lose turgor due to water loss, show this lack of structural support by --
wilting
13
at the cellular level, loss of turgor is seen as -- caused the lack of internal pressure
gaps b/t plasma membrane and cell wall (plasmolysis)
14
Cut -- leaf into halves
Elodea
15
place -- pieces of tissue on microscope slides with 1-2 mL solution
2
16
always ensure that the strips are --
completely submerged in solution
17
in mesophyll cells, the thickly packed -- are all contained in the thin layer of cytoplasm surrounding the vacuole and may be used as a marker for the withdraw of the plasma membrane
chloroplasts
18
count out 30 cells in the right corner of the -- and count how many are plasmolysed
field of view
19
make a second measurement after 30 minutes of equilibrium (the first measurement was after 5 min) and be sure to count --
the same 30 cells as before
20
T/F: you may need to interpolate the concentration
true
21
disengaging the cell membrane from the cell wall is very stressful so it is more common to see --
cell shrinkage
22
cell shrinks and cell membrane -- taking the cell wall with it
withdraws
23
cell collapse could have important effects on leaf hydraulic conduction which is capacity of water to move through the leaf and make up for --
water lost during transpiration when stomata open to capture CO2 for photosynthesis
24
species for cell collapse
Eucalyptus and Lantana
25
for each species take -- with two leaves each
2 branches
26
two leaves from each species are to be dried and measured --
progressively
27
the remaining two leaves should be put with petioles under water and be measured progressively and returned to water each time
control leaves
28