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I am looking at ions in the body and am a bit confused about the differences between ion pumps and ion channels, and how they interact with each other. I want to know what determines the ion concentration in the bath that feeds the ion channels, is this determined by ion pumps, environmental factors or a mix.

Thanks for your help.

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Is this a homework/study question? If so it should be tagged with the 'homework' tag. –  fileunderwater Nov 14 '13 at 11:07
how do you do that? –  tim Nov 14 '13 at 13:55
@tim I just did. Your question is still not clear though. The main difference between pumps and channels is that pumps are active and can pump up a concentration gradient while channels are passive and work by diffusion. –  terdon Nov 14 '13 at 14:43
@terdon is right Tim, this is still a bit vague to answer. Ion channels can open and close, but work via passive diffusion. Ion pumps actively go against the potential gradient and thus require energy to operate. They often work in tandem. –  Atl LED Nov 14 '13 at 20:50

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