Please enable JavaScript.
Coggle requires JavaScript to display documents.
Transport Processes (Diffusion, Osmosis, And Active Transport (Diffusion…
Transport Processes
Water Potential
Free energy of water
Pressure Potential
pressure on water potential
Osmotic Potential
effects solutes have on water
Matric Potential
adhesion to non dissolved structures
Short-Distance Intercellular Transport
Motor Cells
either accumulate
or expel potassium
adjust their water potential
and turgidity
Transfer Cells
smooth on outer surface
numerous finger-like
and ridge-like outgrowths
on inner surface
Guard Cells
water enters and leaves
when open
potassium enters
when closed
shrink
little internal pressure
Symplast
protoplasm of one plant
Apoplast
wall and intercellular space
Long-Distance Transport:Phloem
Pressure Flow Hypothesis
water and nutrients
moves through phloem
Actively Transported
sugars into sieve elements
Polymer Trap Mechanism
loads phloem
Mass Transfer
sugars and other nutrients
transported by phloem
by the hour
Sinks
receive phloem sap
Long-Distance Transport:Xylem
Water Transport Through Xylem
Transstomatal Transpiration
water loss
Transcuticular Transpiration
water loss
through cuticle
Properties of water
Adhesive
molecules interact
other substances
Cohesive
molecules bound
Cavitation
water column breaks
Embolism
air bubble
Diffusion, Osmosis, And Active Transport
Diffusion
High to Low Concentration
Osmosis
water transport
Freely permeable
solutes diffuse
completely permeable
nothing passes
selectively permeable
certain substances pass
Aquaporins
protein channels
molecular pump
force molecules
