Compare the values below. Which is greater, or are the twovalues equal?A. PCO2 in the right atrium of an animal at restB. PCO2 in the right atrium of an animal that has beenexercising for one hourO A is greater than BB is greater than AO the values are equal

Answered: Compare the values below. Which is…

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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Question

Compare the values below. Which is greater, or are the two
values equal?
A. PCO2 in the right atrium of an animal at rest
B. PCO2 in the right atrium of an animal that has been
exercising for one hour
O A is greater than B
B is greater than A
O the values are equal

Expert Solution

Step 1

In arteries the PCO2 (partial pressure of carbon dioxide) remains same at rest and during exercise.

But in venous circulation the PCO2 increase during exercise because during exercise high amount of CO2 is produced by the muscles. This CO2 (deoxygenated blood) is transported by venous circulation into the right atrium. Then from the right atrium it is transported to the right ventricle and then it is transported to the lungs by pulmonary artery where CO2 is released and O2 is added to the blood. As a result the blood becomes oxygenated.

So, B (PCO2 after 1 hour of exercise) is greater than A (PCO2 in rest).

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