2.5 Transport Systems - Plants Flashcards
What transport organs are in plants.
Roots, stems and leaves.
What is a leaf structure made up of?
The upper epidermis, palisade mesophyll, spongy mesophyll, vein (consisting of xylem and phloem), lower epidermis, guard cells, and stomata.
What is transpiration?
Transpiration is the process of water moving through a plant and its evaporation through the stomata.
What factors affect the rate of transpiration?
Wind speed, humidity, temperature, and surface area.
Where in the plant is sugar transported?
In the phloem.
What does the phloem consist of?
Phloem cells have sieve plates and associated companion cells.
Which tissue in the leaf is where photosynthesis occurs?
Palisade mesophyll
Which tissue in the plant is a protective layer on the upper surface of the leaf
Upper epidermis
Which tissue in the leaf is where the diffusion of gases occurs?
Spongy mesophyll
What are the small openings that allow carbon dioxide, oxygen and water into and out of the leaf called?
Stomata
What are the cells that control the opening and closing of stonata called?
Guard cells
At which specialised cell does water enter a plant
The root hair cells
By which process does water enter root hair cells?
Osmosis
How are root hair cells adapted?
The root hair increases the surface area for osmosis
Which tissue in the stem transports water?
Xylem
In which direction is water transported in the xylem?
Up
What substabce strengthens the Xylem tissue
Lignin
Which tissue in the plant stem is dead?
Xylem
In which direction does the phloem transport sugars
Up and down
What piece of equipment can be used to measure transpiration rate?
A potometer
With a potometer which two measurements are needed to work out the rate of transpiration in a plant?
The distance the bubble has moved/voume of water taken up
AND
Time
