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Transport Processes, to, table - Coggle Diagram
Transport Processes
Diffusion, Osmosis, and Active Transport
Diffusion
random particles movements
moves
relatively high concentration
relatively low
concentration.
osmosis
Diffusion through membrane
Membranes
three types
Completely
impermeable
nothing can pass
isolation barriers.
selectively permeable
certain substances passes
lipid/protein cell membranes
Freely permeable
all solutes passes
little biological significance.
Active transport
uses ATP
extremely concentrated
Molecular pumps
#
Aquaporins
#
protein chanel
Water molecles passes through all membrance
intracellular transport
vesicles migrate through cytoplasm
fuse with another organelle.
Long-Distance Transport: Phloem
#
pressure flow hypothesis.
sources
water and nutrients transport
STM/CC
complex
produce sugar exported to rest plants
dominant sourcs
leaves during summer
membrance bound
molecular pumps
Active transport
Water Potential
Cells and Water Movement
contains solutes
cause osmotic potential
three components
ψ = ψπ + ψp + ψm
ψπ -osmotic potential
effect of solutes on water
ψm - matric potential
decrease water’s free
energy
ψp -pressure potential,
effect or pressure on water
Water moves whenever there is a difference
two regions are equal
always be considered in pairs or groups
Short-Distance Intercellular Transport
Motor Cells
located along the midrib
can accumulate or expel Na
sensitive plant ,prayer plant
Transfer Cells
larger membrance
more molecular pump
plasma pressed firmly
rate of actively transport
depends
number of
molecular pumps
found
rapid short distance transport
outersurface
smooth
innersurface
finger-like
ridge-like
Guard Cells
#
short-distance intercellular
transport.
hydraulic equilibrium
opening and closing of stomatal pores
Potassium pumped to surrounding cells
Long-Distance Transport: Xylem
Water Transport Through Xylem
cohesion-tension hypothesis
transstomatal transpiration.
transcuticular transpiration
Control of Water Transport by Guard Cells
#
Bulk water movement
transstomatal transpiration
significant
open stomatal pores
trade between Co2 & water
carries mineral upward
root to shoot
Properties of Water
interact strongly
cohesive
adhesive
adheres firmly to soil particles
heavy
lifting requires great energy
to
