phloem and mass flow

Question 1

what is the ploem for

Answer 1

transport glucose , sucose (g+s from photsynthsis in leaves ), amino acids, water (via osmosis) up and down the plant

Question 2

translocation

Answer 2

the movement of materials in plants from the leaves to other parts of the plant.

Question 3

stage 1 of the mass flow hypothesis
sucrose is a…… tr…….. from cells to s….. into the phloems si… . this is done by comp….. cells in the mit……..)

Answer 3

actively transported
source
sieve
companion
mitrochondria

Question 4

stage 2 of the mass flow hypothesis
this lowers the w…… po…… of phloem

Answer 4

water potential

Question 5

stage 3 of the mass flow hypothesis
lowering the wp causes w…. to enter via o……. this allows the hy…….. p…… to increase (bc vol of water increases)

Answer 5

water
osmosis
hydrostatic pressure

Question 6

stage 4 of the mass flow hypothesis
at s…, su…. is a……. t……. out of the ph…. to s… cells

Answer 6

sink
sucrose
sctively transported
phloem
sink

Question 7

stage 5 of the mass flow hypothesis
WP of s…. cells d……… and WP of phloem increses
so (becuase water is co……) it follows s…….. into sink cells by os…../ could go back to xy……

Answer 7

sink
decrease
coheasive
sucrose
osmosis
xylem

Question 8

stage 6 of the mass flow hypothesis
this l…. the hy…….. pre…… at s… end of phloem

Answer 8

lowers
hydrostatic pressure
sink

Question 9

overall fluid id forced out of area with high hy……. pre….. at sou… areas of low h…….. pressures at s…. . the pressure gradient pushes towards si..

Answer 9

hydrostatic pressure
source
hydrostatic pressure
sink
sink

Question 10

evidence against mass flow hypothesis
orgaic materials have to reach s…. ranging from roots- flowers so have can sap move up/ down at same time

sucrose moves at standard s…. doesnt change depending on con…… gra……

Answer 10

sinks
speed
concentratio gradient