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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Discuss Concepts Hyperventilation, or overbreathing, is breathing faster or deeper than necessary to meet the body’s needs. Hyperventilation reduces the CO2 content of blood, butdoes not significantly increase the amount of O2 available totissues. Why might this be so?

Summary Introduction

To review:

Hyperventilation reduces CO2 (carbon dioxide) content of blood but does not significantly increase the amount of O2 (oxygen) available to tissues.

Introduction:

Hyperventilation is an increased rate of ventilation that leads to abnormally low blood CO2 levels and high blood pH. Ventilation rate affects only the CO2 level and is independent of the cellular oxygen needs.

Explanation

In hyperventilation, more CO2 is breathed out than usual. The partial pressure of CO2 in blood reduces, causing low levels of CO2 in alveoli. There is less dilution of oxygen in the lungs. Thus, the concentration, and the partial pressure, of O2 in alveoli will increase...

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