Facilitated diffusion flashcard sets

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1-1 of 1Facilitated diffusion flashcard sets
# Title Terms Date
1Cell Transportby hollystevens18 termsOctober 27, 2009
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facilitated diffusion definitions
# Definition Sets
1movement of specific molecules across cell membranes through protein channels117 sets
2many polar molecules and ions impeded by the lipid bilayer of a membrane diffuse passively with the help of transport proteins that span the membrane30 sets
3the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins29 sets
4pathway provided by transport proteins that helps certain molecules pass through a membrane22 sets
5when substances transport across cell membranes using protein carrier molecules18 sets
6the spontaneous passage of molecules and ions, bound to specific carrier proteins, across a biological membrane down their concentration gradients.15 sets
7passive transport of materials across a plasma membrane by transport proteins embedded in the plasma membrane13 sets
8the spontaneous passage of molecules and ions, bound to specific carrier proteins, across a biological membrane down their concentration gradients10 sets
9movement of molecules through protein channels in the membrane from high to low concentration8 sets
10the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins.8 sets
11a process in which substances move down their concentration gradient across the cell membrane with the assistance of carrier proteins8 sets
12the passage of a substance across a biological membrane down its concentration gradient, aided by specific transport proteins.7 sets
13transport proteins provide a pathway for certain molecules to pass7 sets
14polar substances that cannot pass through the nonpolar cell wall are moved across by protein pumps or proteins that pull through the membrane, no energy is required7 sets
15the movement of molecules across a membrane with the help of protein molecules7 sets
16the spontaneous passage of molecules or ions across a biological membrane with the assistance of specific transmembrane transport proteins.7 sets
17movement of specific molecules across cell membranes through protein channels.6 sets
18transport of substances through a cell membrane down a concentration gradient aided by carrier proteins6 sets
19the passage of a substance through a specific transport protein across a biological membrane down its concentration gradient.5 sets
20this process is used for molecules that cannot readily diffuse through the cell membrane5 sets
21movement of molecules across a cell membrane through protein channels5 sets
22a form of diffusion that requires the assistance of a transport protein5 sets
231. doesn't require energy 2. goes down the concentraion gradient4 sets
24what is the diffusion of solutes or water through channel proteins in the plasma membrane?4 sets
25diffusion through selective pores4 sets
26transport proteins speed the passive movement of molecules across the plasma membrane3 sets
27a type of diffusion where proteins assist the movement of molecules across the membrane.3 sets
28involves the use of a protein to facilitate the movement of molecules across the membrane. in some cases, molecules pass through channels within the protein.3 sets
29molecules move through protein channels instead of a membrane3 sets
30used for molecules that cannot readily diffuse through cell membranes3 sets
31the passage of a substance across a biological membrane down its concentration gradient, aided by specific transport proteins3 sets
32diffusion of molecules assisted by protein channels that pierce a cell membrane3 sets
33a process in which substances are transported across cell membranes by means of protein carrier molecules3 sets
34the passive movement of molecules down their concentration gradient via transport proteins3 sets
35diffusion through selected pores3 sets
36a process by which substances are moved across a cell membrane down their concentration gradient using a protein carrier.3 sets
37process that moves materials from high to low concentration with the help of protein channels; does not require energy3 sets
38movement of specific molecules across cell membranes though protein channels3 sets
39the spontaneous passage of molecules or ions across a biological membrane with the assistance of specific transmembrane transport proteins3 sets
40water diffuses by3 sets