Chapter 19, Problem 2RQ

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

Chapter
Section

Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

The oxygen diffusion capacity of high-altitude natives is aboutA. 5-10 percent greater than predictedB. 10-15 percent greater than predictedC. 15-20 percent greater than predictedD. 20-25 percent greater than predicted

Summary Introduction

Introduction:

The atmospheric or barometric pressure decreases with the altitude. The high altitude often causes acute mountain sickness to the people traveling there because of the decreased atmospheric pressure, which results in the decreased solubility of oxygen in the air. The cardiac and pulmonary functions are altered due to this. The vital capacity of the lungs decreases due to airway narrowing which occurs as a result of decreased air density. The decreased barometric pressure at high altitude also lowers the partial pressure of oxygen in the alveoli.

Explanation

Justification/ Explanation for the correct answer:

Option (d) is 20-25 percent greater than predicted. The oxygen diffusion capacity in the blood decreases with the increase in altitude because the partial pressure of oxygen decreases with altitude. The people living for a long term at high altitude usually adapt to deal with this problem. The oxygen diffusing capacity in these persons is 20-25 percent greater than the predicted value. They also have increased hemoglobin content and an increased number of red blood cells. Hence, option (d) is correct.

The explanation for the incorrect answers:

Option (a) is 5-10 percent greater than predicted. The diffusion capacity is 20-25 percent greater than predicted in the native people of high-altitude places. The reason behind this increased capacity is that at high altitude the partial pressure of oxygen decrease and thus the alveolar pressure...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Why are interstellar lines so narrow?

Horizons: Exploring the Universe (MindTap Course List)

What are genomes?

Human Heredity: Principles and Issues (MindTap Course List)

___ is the actual path length. (2.2)

An Introduction to Physical Science

What is the function of the central vacuole in plants?

Biology: The Dynamic Science (MindTap Course List)