Specialised plant cells Flashcards
1
Q
What are the 3 specialised plant cells?
A
- Palisade cells
- Root hair cells
- Guard cell pairs
2
Q
What is the role of palisade cells?
A
Absorbs light for photosynthesis
3
Q
What is the role of root hair cells?
A
Uptake of water + minerals
4
Q
What is the role of guard cell pairs?
A
Form stomata (small openings) involved in CO2 + water exchange
5
Q
How are palisade cells specialised to do their role?
A
- Contain chloroplasts to absorb light
- Rectangular box shapes = Can be closely packed to form continuous layer
- Thin cell walls = Increases rate of diffusion of CO2
- Large vacuole = Maintain turgor pressure
6
Q
How are root hair cells specialised to do their role?
A
- Present at surface of roots, near growing tips
- Have long extensions (root hairs) = Increases SA of cell, which maximises uptake of water + minerals from soil
7
Q
How are guard cell pairs specialised to do their role?
A
- On surface of leaves = Lets CO2 enter plants for photosynthesis
- Change shape = When guard cells lose water become swollen due to osmotic forces
- Cell walls thicker on 1 side = So cell doesn’t change symmetrically as volume changes
