On Cells and Pumping Hydrogen

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Dimitri
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On Cells and Pumping Hydrogen

Post by Dimitri » Fri Jan 28, 2005 3:18 am

I'm trying to prove to my professor that the reason why cells pump hydrogen ions out (as in proton pumps) to acquire nutrients and what not outside the cell membrane is because it takes less energy to do so, and our cells are programmed to conserve as much energy as we can.

so im trying to name other reaosns for cells to pump out hydrogen... because if I can name several, then it would prove that it saves energy as opposed to creating specific pumps or protein receptors for each.

i've thought of one, osmotic balance. anyone else know of others?

thanks.

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mith
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Post by mith » Fri Jan 28, 2005 8:26 pm

I believe that hydrogen ion is an electron which is electricity. I'm thinking electro-gradient. Dunno what the right term for it is.

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Post by Dimitri » Fri Jan 28, 2005 9:15 pm

Yeah electrochemical gradient... can anyone else think about of other purposes of releasing hydrogen from inside a cell?

hmm... this seems to be a harder task than what i thought...

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mith
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Post by mith » Tue Feb 01, 2005 5:23 am

How do you mean save energy anyway? I mean if it pumps, it uses energy. And what are you comparing it to?
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Post by Carin » Thu Feb 17, 2005 1:27 pm

proton pumps are used in photosynthesis and respiration to drive ATP Synthase enzyme to make ATP (ENERGY!!) to be used in biochemical pathway down the line. In photosynthesis to store energy in chemical bonds in respiration to release energy from bonds

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Post by RobJim » Tue Feb 22, 2005 12:34 pm

mithrilhack wrote:I believe that hydrogen ion is an electron which is electricity. I'm thinking electro-gradient. Dunno what the right term for it is.


Hydrogen ions are protons, not electrons.
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mith
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Post by mith » Tue Feb 22, 2005 8:35 pm

A H+ is a proton, but isn't a H- an electron?
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Post by RobJim » Tue Mar 01, 2005 2:53 am

H- is a proton with two electrons. It's not called a hydrogen ion; it's name is the hydride ion.
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Post by mith » Tue Mar 01, 2005 4:51 am

thx for the clarification.
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yeah! Intelligent!!

Post by 2810712 » Thu Mar 03, 2005 5:43 am

I'm trying to prove to my professor that the reason why cells pump hydrogen ions out (as in proton pumps) to acquire nutrients and what not outside the cell membrane is because it takes less energy to do so, and our cells are programmed to conserve as much energy as we can.

so im trying to name other reaosns for cells to pump out hydrogen... because if I can name several, then it would prove that it saves energy as opposed to creating specific pumps or protein receptors for each.

i've thought of one, osmotic balance. anyone else know of others?


thanks.
-Dimitri

Yeah , are you talking about those microbes which pump H+ out the cell to get nutrients ?... listen everybody , Dimitri is not talking about those H+ pumps in the chloroplast or mitochondria , its about those in the plasmalemma, M I right D.?

In such a case maintaining pH of the cell fluid may also be the function ,
Also, If something does many functions it doesn't mean that it saves energy...

hrushikesh

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