uptake in the root Flashcards
1
Q
where are root cells, and what do they do?
A
specialised cells on the epidermis of the roots
provide a large surface area for water and mineral ions absorption
2
Q
what are 2 adaptations of root hair cells?
A
thin cell walls - reduce diffusion distance
close contain with soil particles - increasing the efficiency of absorption
3
Q
what is the cortex?
A
a layer of loosely packed cells, located beneath the epidermis.
this allows for easy movement of water and solutes
4
Q
what is the Casparian strip?
A
a waterproof band of suberin
5
Q
what is the role of the casparian strip?
A
it forces water and solutes to pass through the cell membranes (symplast route) rather than between cells (apoplast route).
6
Q
what is the stele
A
the central part of the root, containing the xylem and phloem
