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Explain how breathing controls blood pH.

Question:

Explain how breathing controls blood pH.

pH:

Hydrogen ion concentrations are important in the human body. These will determine a lot about how the body acts, especially things like proteins and enzymes whose function can vary depending on the pH. Normally, the blood pH ranges from about 7.35-7.45.

Answer and Explanation: 1

The respiratory buffer is an effective means of pH control in the body. The majority of carbon dioxide in the bloodstream is transported as a bicrobonate ion by reacting with water through the enzyme carbonic anhydrase. This reaction produces a bicarbonate ion and a hydrogen ion. Therefore, by breathing more, we expell more CO2 and thus lower hydrogen ion concentration, or vice versa. This is tightly controlled in the body.


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Carbon Dioxide Transport in the Blood

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Chapter 13 / Lesson 4
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Carbon dioxide is transported in the blood in two different forms, bicarbonate and carbaminohemoglobin. In this lesson, dive into carbon dioxide transportation in the blood, in the lungs, and in metabolizing tissues.


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