D2.3 Water Potential HL Flashcards
1
Q
water potential is the sum of…?
A
solute potential and pressure potential
2
Q
equation for water potential
A
Ψw = Ψs + Ψp
3
Q
what happens to solute potential is solute concentration increases?
A
solute potential decreases
solute conc increase = solute potential decrease
4
Q
solute potential of pure water
A
0
5
Q
if put something inside the [water], what happens to the solute potential?
A
solute potential will decrease and become more negative
6
Q
what happens if the pressure is falls below atmospheric pressure?
A
if fall below: pressure potential will drop
7
Q
how to read a nomogram?
A
where the 2 lines intersect
8
Q
Explain the higher pressure potential in the root cells than in the soil surrounding the root cells than in the soil surrounding the root. [5]
A
- more negative solute potential in root cells than soil
- due to active transport of mineral ions into the root
- so water potential is lower in the root cells; so water moves from the soil to the root cells
- causing an increase in pressure
- atmospheric pressure in the soil
9
Q
A
