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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 People are occasionally found unconscious from breathing too much CO2(as from a charcoal heater placedindoors) or too much CO (as from auto exhaust in a closed garage). Would it be more advantageous to give pure O2 to a person breathing too much CO2 than simply moving the person to fresh air? Why? Which—pure O2 or fresh air—would be best for a person unconscious from breathing CO? Why?

Summary Introduction

To review:

Whether pure oxygen is advantageous to a person breathing too much CO2 (carbon dioxide) than simply moving the person to fresh air. Or whether the fresh air or pure O2 (oxygen) would be best for the person unconscious from breathing CO (carbon monoxide).

Introduction:

CO is highly toxic as it displaces O2 from hemoglobin and reduces the amount of O2 reaching the body tissues. Breathing CO continuously for a few minutes will block the flow of O2 to the brain resulting in unconsciousness and brain damage.

Explanation

Fresh air would be more advantageous to a person breathing too much CO2. It is often caused by hypoventilation or disordered breathing. Less CO2 is removed from the body but O2 saturation is not much affected. For such conditions moving the person to fresh air is sufficient to produce ventilation. Pure oxygen is 100% O2 and is not prescribed for hypoventilation...

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