The movement of materials through a cell membrane without using energy
the difference in concentration of a substance across space.
the movement of molecules from an area of higher concentration to an area of lower concentration
diffusion of water through a selectively permeable membrane
a solution that causes a cell to shrink because of osmosis
a solution that causes a cell to swell because of osmosis
a solution that produces no change in cell volume because of osmosis
a transport protein with a polar pore through which ions can pass
a protein that transports substances across a cell membrane
the transport of substances through a cell membrane along a concentration gradient with the aid of carrier proteins
the movement of materials through a cell membrane using energy
a carrier protein that actively transports K+ ions into and Na+ ions out of cells
the movement of a substance into a cell by a vesicle
process by which vesicles release their contents outside the cell
a protein that binds specific signal molecules, which causes the cell to respond
acts as a signal molecule in the cytoplasm
Please allow access to your computer’s microphone to use Voice Recording.
We can’t access your microphone!
Click the icon above to update your browser permissions above and try again
Reload the page to try again!
Press Cmd-0 to reset your zoom
Press Ctrl-0 to reset your zoom
It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.
Your microphone is muted
For help fixing this issue, see this FAQ.