Ch. 36 AP Biology Campbell

Transport in Vascular plants

52755514	membrane potential	the charge difference between a cell's cytoplasm and the extracellular fluid
52755515	cotransport	the coupleing of a "downhill" diffusion of one substance to the "uphill" transport against its own concentration gradient
52755516	chemiosomosis	energy coupling mechanism that uses energy stored in the form of H+ gradient a membrane to drive cellular work
52755517	osmosis	solution from a lower solute concentration to higher solute concentration
52755518	water potential	combined effects of solute concentration and physical pressure are incorporated into this measurement
52755519	water potential= solute potential + pressure potential	formula for water potential
52755520	pressure potential	the physical pressure on a solution
52755521	turgor pressure	cell contents press the plasma membrane against the cell wall, creating this pressure
52755522	plasmolyze	shrink away from a cell wall
52755523	flaccid	limp
52755524	turgid	firm
52755525	aquaporin	transport proteing in the plasma membrane of the plant that specifically facillitates the diffusion of water
52755526	vacuole membrane	{tonoplast} regulates molecular traffice between the cytosol and the other vacuolar contents
52755527	symplast	the continuum of cytoplasm connected by plasmodesmata
52755528	apoplast	the continuum of cell walls plus the extracellular spaces
52755529	lateral transport	{short distance transport}
52755530	transmembrane	transport--repeated crossing of plasma membrane as the solutes exit one cell and enter the next
52755531	symplastic	{Transport} after entering one cell, solutes and water can then move from cell to cell via plasmodesmata
52755532	apoplastic	{transport} the continuum of cell walls plus the extracellular space
52755533	phloem	In the ____ the loading of sugar generates a high positive pressure at one end of sieve tube , forcing sap to the opposite end of the tube
52755534	xylem	In_____it is actually tension (negative pressure) that drives long distance transport
52755535	transpiration	the evaporative loss of water from a plant
52755536	endodermis	innermost layer of cortex in plant roots
52755537	root pressure	the upward push of xylem sap in the vascular tissue of roots
52755538	cohesion	the binding together of like molecules
52755539	adhesion	the attraction between different kinds of molecules
52755540	circadian rythm	cycle tjat is present in all eukaryotic organisms
52755541	xerophyte	plant adapted to an arid clmiate
52755542	translocation	transport of organic nutrients in the phloem of vascular plants
52755543	sugar sink	organ that is a net consumer or storer of sugar