Lecture 7: Mineral Nutrition Flashcards
1
Q
organic materials come from
A
C, H, Os
atmosphere and water
2
Q
inorganic materials come from
A
soil and water
3
Q
Types of transport processes
A
- Bulk flow
- Diffusion
- Osmosis
- Facilitated transport
4
Q
Bulk flow
A
- driven by pressure difference between two ends
5
Q
Diffusion
A
- due to inherent thermal energy of molecules
- it involves no applied force
- concentration gradient provides direction
6
Q
Osmosis
A
special case of diffusion
- diffusion across selectively permeable membrane (allows solvent but not solute to go through)
7
Q
Facilitated transport
A
by carrier proteins, membrane channels and energy requiring pumps
8
Q
symporter
A
two molecules move across membrane together
9
Q
antiporter
A
two molecules move separately across the membrane
10
Q
Routes of travel
A
- Transmembrane route: via water channels
- Apoplastic route: within porous cell walls (Caspian strip blocks this route)
- Symplastic route: via plasmodesmata
11
Q
source tissue
A
leafs/stem
12
Q
sink tissue
A
flower, young leaves and roots
13
Q
moving photosynthesis products
A
- uploaded in phloem of source tissue, transported in phloem and then unloaded in sink tissue
14
Q
What makes an element ESSENTIAL?
A
- if you take the element out of the solution, the plant wont grow or complete its life cycle
- the element cannot be replaced by a similar element
- its lack/absence must produce a specific deficiency symptom
15
Q
soil particles
A
negatively charged therefore will bind with cations
