Transport in Plants-Chapter 37 Flashcards
____________ is used to predict which way water will move. measure in MPa or _____________.
water potential
megapascals
water always moves from _______ to _________ water potential
high to low
the total potential energy of water in the cell is the __________
water potential
water moves in the direction that eventually results in ____________
equilibrium
water will move towards the greater amount of solute in efforts to dilute the sample
true
when water moves into a cell, it becomes swollen or _________. when water moves out of the cell, it will shrink and become __________ (___________ occurs)
turgid
plasmolysis
flaccid
water channels that exist in vacuole and cell membranes, speed up osmosis, allow for equilibrium to be established quickly
aquaporins
long distance movement of water is assisted by a pulling force called _____________
transpiration
was you move up a a plant from the roots, the water potential ____________ which allows water to move against gravity and up the plant
decreases
water moves……….
into the roots, up the xylem, fills the empty spaces in between the mesophyll cells in the leaf, and evaporates through the stoma
water moves into the roots only if the soil’s water potential is ____________. usually happens because the water is freshwater, root has more solutes than freshwater. roots are usually turgid
greater
absorb most of the plant’s water, collectively provide enormous surface areas
root hairs
surface area for water and mineral absorption is further increased by ______________ fungi, particularly helpful in phosphorous uptake
mycorhizae
water and minerals cannot travel between cells, they must travel through the cell via the symplastic route, plants can regulate fluid and ion concentration before entering the xylem, watertight later in between endodermis cells
casparian strip
channels of dead cells that function as vascular tubes, the water moves from the root hairs and ground tissue, lower water potential than the roots, runs the length of the plants and ends in the leaves
xylem
Why doesn’t water move down the xylem?
(1) tensile strength
(2) water coheres to itself
(3) water adheres to the the walls due to its polarity
tensile strength varies ___________ with diameter
inversely