Biology Flashcards

4918646733	diffusion	particles tend to move from area of high concentration to area of lower concentration	0
4918650661	facilitated diffusion	molecules that can't directly diffuse accross the membrane pass through special protein channels	1
4918650675	aquaporins	cells contain water channels, proteins that allow water to pass through them	2
4918652819	osmosis	the diffusion of water through a selectively permeable membrane	3
4918665832	isotonic	2 solutions that have same strength (osmotic pressure) - no change	4
4918682829	hypotonic	causes cell to burst - when comparing 2 solutions, the solution with the lesser concentration of solutes	5
4918688431	hypertonic	above strength - the solution with the greater concentration of solutes	6
4918808771	osmotic pressure	driven by difference in solution concentration - the net movement of water in or out of cell	7
4918819951	homeostasis	relatively constant internal physical and chemical conditions that organisms maintain	8
4918838432	tissue	groups of similar cells that perform a particular function	9
4918840986	organ	group of tissues that work together to perform (stomach)	10
4918848341	organ system	group of organs that work together (digestive, respiratory)	11
4918855866	receptor	on or in a cell, a specific protein to whose shape fits that of a specific molecular messenger, such as a hormone	12
4918881300	endocytosis	a type of active transport that moves a substance by a vesicle to the inside of the cell	13
4918883043	exocytosis	a type of active transport that moves a substance by a vesicle to the outside of the cell	14
4918897929	equilibrium	concentration of a substance is equal through out space	15
4918906004	concentration gradient	difference in the concentration of a substance across a space	16
4918913511	active transport	this type of transport is the movement of a substance against the substances concentration gradient	17
4918923291	carrier protein	protein used to transport specific substance across the plasma membrane	18
4918934944	ion channel	transport protein through which only ions can pass	19