Transport from the stele of the root to the leaves....translocation Flashcards
1
Q
Translocation
A
Movement of mineral elements from the source to the sink
2
Q
The sink
A
Place where the substances are used
E.g. leaves
3
Q
Source e.g.
A
The root hairs
4
Q
How is root pressure created
A
Created by ongoing osmosis of water into the root
5
Q
What does root pressure do
A
This builds up water in the xylem of the stele and forces water to rise up the stem against the force of gravity
6
Q
Capillary movement
A
Movement of water through the tracheids, fibres and vessels of xylem tissue
This happens due to interaction between the forces of adhesion and cohesion
7
Q
Adhesion forces
A
Water molecules stick to xylem they are moving through. This causes a climbing force
8
Q
Cohesion forces
A
Water molecules attract each other. Water molecules hold together and pull water along
