Transpiration and Translocation Flashcards
Which part of the plant is glucose produced in?
leaves
What do we call the movement of cell sap (a mixture of sugar and water) up and down the plant?
Translocation
How do root hair cells absorb water from the soil?
Osmosis
Which substance are xylem cells reinforced with to make them stronger?
Lignin
What happens to the rate of transpiration if wind speed increases?
It increases
true or false?
Translocation takes place via phloem tubes. These are made up of lots of phloem cells, which are separated by tiny pores that allow cell sap to pass through.
true
What does the xylem transport in a plant?
Water and dissolved mineral ions
What is transpiration?
The evaporation of water from the leaves
What happens to the rate of transpiration if wind speed increases?
it increases because wind blows away water vapour as soon as it diffuses out of the leaf. This maintains a strong concentration gradient between the inside and outside of the leaf, which increases the rate at which water diffuses out.
Why does water loss slow down if a plant is put into a plastic bag?
The humidity of the air in the bag increases at the plant loses water. This means there is a lower concentration gradient between the inside and outside of the leaves, reducing the rate of water loss.
what is xylem tissue made of
hollow tubes of dead cells strengthened by lignin
how does water move through the xylem
in one direction up the plant
what is the role of phloem tissue
transports dissolved sugars and dissolved acids
what is phloem tissue made of
live elongated cells which form long tubes
