Principles of Biology
Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Chapter 36.7, Problem 1TYK
Summary Introduction

Introduction:

In respiration, vertebrates use the lungs to release CO2 and take oxygen. Lungs take the deoxygenated blood from the heart by returning oxygenated blood to the heart. This process exerts high pressure on the lungs.

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following gas exchange in the lungs blood returns to the left side of the heart and it's distributed through the aorta to the systemic tissues of the body. What is the pressure of oxygen in the blood that is being delivered to the systemic tissues? 46mmHg, 104mmHg, or 95mmHg.
A common laboratory test for a patient is to measure blood gases—that is, the partial pressures of O 2 and CO 2 in oxygenated blood. Normal values are 100 mm Hg for O 2and 40 mm Hg for CO 2. A high or low level of one or both readings has some underlying cause. Offer an explanation for each of the following situations. a. If a patient comes in agitated and hyperventilating—breathing very rapidly—the partial pressure of O 2 is normal but the partial pressure of CO 2 is 22 mm Hg. b. A patient with chronic lung disease has a partial pressure of O 2 of 60 mm Hg and a partial pressure of CO 2of 60 mm Hg.
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