What other organs, beside the kidneys, sustain regulate blood pH?
Answers: The lungs. http://www.emedicine.com/med/topic2009.h...
If we hyperventilate, we blow off CO2 creating a condition surrounded by the blood called hypocapnia. This draws out acerbic making the blood relatively alkalotic and creating a situation called respiratory alkalosis.
The disparate pertains as well. Hypoventilation lead to hypercapnea and a metabolic acidosis.
Either of these can be primary problems, in which overnight case the kidney will compensate with a metabolic acidosis or alkalosis.
Or, if the kidney is the impose of the acid-base disturbance, say, a metabolic acidosis from kidney flop, the lungs compensate by hyperventilating and creating a compensatory respiratory alkalosis. Very clever!
It's why you hyperventilate after running and developing a lactic (metabolic, but not renal) acidosis. It's not just for O2, but also to blow stale CO2
The lungs are the other major regulator of blood pH.
Carbon dioxide produced within the tissues dissolves and forms carbonic acid contained by the blood, which lowers the blood pH. When the carbonic acid reach the lungs, it is able to be converted fund to carbon dioxide and diffuses into the alveoli where it can be breathed out. The skilfulness to breath carbon dioxide out is an important process of regulating the blood pH. If you didn't breath, the carbonic acid would build up and your blood would become sharp. This is called a respiratory acidosis.
On the other foot, when people hyperventilate (i.e. they breath too much carbon dioxide out), they run the risk of raise their blood pH and developing a respiratory alkalosis. Alkalosis leads to a variety of symptoms including headache, dizziness, tingling of the fingers and lips, etc.
Another point to keep within mind is that the respiratory system is controlled by the brain (both consciously and unconsciously!). The brain has several mechanism of sensing and determining the blood pH. It integrates this information and controls breathing in decree to maintain both proper blood pH as economically as oxygen content.
Your buffer system is between carbon dioxide and bicarbonate. Your lungs excrete/retain CO2 and your kidneys excrete/retain HCO3-. CO2 is acidic (hydrolyzes river to release protons) and HCO3- is basic (accepts protons). So if the lungs retain CO2, you become more sour. If the kidneys then retain bicarb, the pH will move towards alkali (or posterior towards baseline in this example).
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