OSMOSIS AND HYDROSTATIC PRESSURE Flashcards
1
Q
Osmosis
A
phenomenon of water flow across a semipermeable membrane
2
Q
Water movement
A
High to low ѰW
3
Q
Aquaporins
A
Tetrameric arrangement (Tetramer): each monomer forms a water channel
4
Q
Turgor pressure
A
+hydrostatic pressure within cells
5
Q
Tension
A
-hydrostatic pressure, frequently develop in xylem
Pulling
6
Q
Rigidity of plant cell wall
A
to prevent the osmotic lysis by hydrostatic pressure
7
Q
Modify aquaporin channel activity
A
Phosphorylation and pH
8
Q
Plasmoylzed
A
hypo inside, hyper outside
solute potential outside less than solute potential inside
9
Q
flaccid
A
isotonic
solute potential = solute potential
10
Q
turgid
A
hyper inside, hypo outside
solute potential outside greater than solute potential inside
11
Q
– sign
A
Reduction of the water potential by dissolved solutes
