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Q). The presence of hemoglobin in normal arterial blood increases its oxygen concentration approximately how many times? A. 10 B. 30 C. 50 D. 70 E. 90

Q). The presence of hemoglobin in normal arterial blood increases its oxygen concentration approximately how many times? A. 10 B. 30 C. 50 D. 70 E. 90

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Q). The presence of hemoglobin in normal arterial blood increases its oxygen concentration approximately how many times? A. 10 B. 30 C. 50 D. 70 E. 90 Answer: D. Normal arterial blood has a Po2 of about 100 mm Hg. The concentration of oxygen in the absence of hemoglobin is the dissolved oxygen, which is 100 × 0.003, or 0.3 ml 02.100 ml-1 blood. However, normal arterial blood contains about 15 g.100 ml-1 of hemo- globin, and each gram can combine with 1.39 ml O2. Since the oxygen saturation of normal arterial blood is about 97%, the total oxygen con- centration is given by (1.39 × 15 × 97/100) + 0.3 ml 02.100 ml-1 blood. This is about 20.5 as opposed to the dissolved oxygen concentration of 0.3 ml 02.100 ml-1 blood. Therefore, the presence of hemoglobin increases the oxygen concentration about 70 times.
Transcribed Image Text:Q). The presence of hemoglobin in normal arterial blood increases its oxygen concentration approximately how many times? A. 10 B. 30 C. 50 D. 70 E. 90 Answer: D. Normal arterial blood has a Po2 of about 100 mm Hg. The concentration of oxygen in the absence of hemoglobin is the dissolved oxygen, which is 100 × 0.003, or 0.3 ml 02.100 ml-1 blood. However, normal arterial blood contains about 15 g.100 ml-1 of hemo- globin, and each gram can combine with 1.39 ml O2. Since the oxygen saturation of normal arterial blood is about 97%, the total oxygen con- centration is given by (1.39 × 15 × 97/100) + 0.3 ml 02.100 ml-1 blood. This is about 20.5 as opposed to the dissolved oxygen concentration of 0.3 ml 02.100 ml-1 blood. Therefore, the presence of hemoglobin increases the oxygen concentration about 70 times.
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