Blood pH and Oxygen/title>  <style type="text/css"> .important { text-align:center; background:#900; color:#FFF; } .format { color:#000000; } .button { text-decoration:none; } .white { background-color:#FFF; } hr { color:#1F497D; background-color:#1F497D; border: 0; height:3px; } .nav { color:#1F497D; } a.nav:link { color:#1F497D; } a.nav:visited { color:#1F497D; } .black { background-color:#000; } a img {border: none;} table.bdr {border:2px solid #4F81BD} .border1 { border:2px solid #4F81BD; } a.format:link { color:#000000; } a.format:visited { color:#000000; } a.button:link { text-decoration:none; } a.button:visited { text-decoration:none; } </style>   </head> <body bgcolor="#FFF" leftmargin="0" bottommargin="0" topmargin="0" marginwidth="0" marginheight="0"> <table width="100%" height="100%" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="50%" height="530" background="/images/template/side_pattern.gif" class="captions"> </td> <td width="1" height="530" 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As a chemical equation, <br> <br> H2O + CO2 = H+ + HCO3- <br> <br> As CO2 levels increase, the concentration of H+ ions also increases. More H+ means more acidic, or a lower pH. This state signals your brain that you need to breathe faster or deeper. Under prolonged oxygen deprivation (like skiing at the top of a mountain for a week), your body balances out the pH by increasing the bicarbonate level (HCO3-). When the + and - charges balance out, the pH is back to neutral levels. <br> <br> Christine Ticknor<br> Ph.D. Student<br> Yale University<br> New Haven, Connecticut <br> <br> <br> <hr> <a class="nav" href="http://www.newton.dep.anl.gov/askasci/mole00.htm">Click here to return to the Molecular Biology Archives</a> </font></td></tr></table></td></tr></table> <div class="white" align="center"><font size="2" face="Arial, Helvetica, sans-serif" color="black"><br> NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by <a class="format" href="http://www.anl.gov">Argonne National Laboratory</a>'s <a class="format" href="http://www.dep.anl.gov">Educational Programs</a>, Andrew Skipor, Ph.D., Head of Educational Programs. <br><br> For assistance with NEWTON contact a <a class="format" href="mailto:help@newton.dep.anl.gov">System Operator (help@newton.dep.anl.gov)</a>, or at Argonne's <a class="format" href="http://www.dep.anl.gov/"> Educational Programs</a><br /><br /> NEWTON AND ASK A SCIENTIST <a name="address"></a> <br /><a class="format" href="http://www.dep.anl.gov">Educational Programs</a><br />Building 360<br />9700 S. 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