Biology Section 3.3: Cell Transport Flashcards

2715028157	Concentration	the amount of the substance (solute) dissolved in a unit of the other substance (solvent)	0
2715028365	Concentration gradient	the difference in concentration of a particular molecule between two regions	1
2715028366	Passive transport	the process of molecular movement which does not require energy	2
2715029910	Diffusion	the net movement of molecules down a concentration gradient	3
2715030282	Facilitated diffusion	the movement of molecules down a concentration gradient with the aid of membrane proteins	4
2715030283	Ion channels	the membrane proteins that open and close to allow specific ions to pass through	5
2715030806	Carrier proteins	the membrane proteins that bind to specific large molecules	6
2715030807	Isotonic	a solution with the same concentration (same amount of solutes/water) as a comparable solution	7
2715030808	Hypertonic	a more concentrated solution; the solution contains more solute and less water	8
2715031181	Hypotonic	a less concentrated solution; the solution contains less solute and more water	9
2715031182	Turgor	the rigid state of a cell due to high water pressure	10
2715031183	Osmosis	the diffusion of water through a selectively permeable membrane such as the cell membrane	11
2715031768	Active transport	the process of molecular movement which requires energy	12
2715031769	Ion pump	the membrane proteins that pumps one-way against the ion's concentration gradient, a form of active transport	13
2715031770	Cotransport	the coupled passage of two molecules through a membrane such as the cell membrane, a form of active transport	14
2715032032	Symport	the coupled passage of two molecules through a membrane in the same direction, a form of active transport	15
2715032033	Antiport	the coupled passage of two molecules through a membrane opposite directions, a form of active transport	16
2715032376	Endocytosis	the action of the cell membrane surrounding outside materials and fusing with itself to bring in materials	17
2715032377	Exocytosis	the action of a vacuole of a cell fusing with the cell membrane to expel materials	18
2715032645	Homeostasis	the ability to maintain stable internal conditions independent of the conditions that exist in the environment	19