Why?

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tawaqul

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why does a small increase in [H+] increase the breathing rate?

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why does a small increase in [H+] increase the breathing rate?

small increase in H+ in the blood is indicative of a small increase in CO2 in the blood. Since according to chemistry non-metal oxides are acidic, whereas metal oxides are basic: CO2 must be acidic. The particular mechanism is CO2 + H2O --> HCO3- --> H2CO3 (carbonic acid). The increase in CO2 in the blood means the blood isn't exchanging enough CO2 with the alveolar capillaries, and isn't receiving enough O2. So, to increase CO2 excretion, and increase O2 absorption by the blood, you increase breathing rate.

It is also interesting to note that CO2 is measured indirectly by the medulla oblongata using its central chemoreceptors to detect H+. O2 is monitored peripherally in the carotid and aortic bodies. I believe these also measure CO2 and H+ though, but have less of an effect.

does that answer your question?
 
wait, so basically is this correct: b/c there is more "acid" in the blood, and 02 is released when surrounded by acids in order to counter the acidity, you need to take in 02 to combat the H+ making it acidic i.e. breathe more often. ?
 
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