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Chapter 12: Transport Processes (Diffusion, Osmosis, and Active Transport,…
Chapter 12: Transport Processes
Diffusion, Osmosis, and Active Transport
Diffusion
High to Low
Osmosis
Diffusion through a Membrane
Freely Permeable
All Solutes
Completely Impermeable
Allow Nothing
Selectively Permeable
Certain Substances
Active Transport
#
ATP
Aquaporins
Molecular Pump
Intercellular Transport
Vesicles Migrate through Cytoplasm
Fuse with Organelles
Short Distance Intercellular Transport
Motor Cells
Transfer Cells
Found were Rapid short distance transport is expected
Guard Cell
Symplast
All the Protoplasm
Apoplast
Wall and Intercellular Space
Water Potential
Cells and Water Movement
Long Distance Transport:Phloem/Xylem
Water Transport Through Xylem
Transstomatal Transpiration
Water loss to Humidity
Transcuticular Transpiration
Water loss through Cuticle
Cohesion-tension Hypothesis
Poikilohydry
Water content that Changes with Habitat
Cavitation
Hydrogen bonding breaking and water column breaks
Embolism
Space between the Break
Control of WaterTransport by Guard Cells
Properties of Water
Cohesive
Force on one molecule acts on neighboring one
Adhesive
Interact with other substances
Phloem
Pressure Flow Hypothesis
Sources
Water and Nutrients transported from
Actively Transported
Sugar to Sieve elements
Polymer Trap Mechanism
Monosaccharides to disaccharides
STM/CC Complex
Conducting cell and Companion cells
Mass Transfer
Sugars/Nutrients by phloem per hour
Specific Mass Transfer
Cross-section area of Phloem
Sinks
Phloem Sap
