# Over the course of life, the diffusion capacity decreases by about A. 5 percent B. 10 percent C. 15 percent D. 20 percent

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909

#### Solutions

Chapter
Section
Chapter 11, Problem 7RQ
Textbook Problem

## Over the course of life, the diffusion capacity decreases by aboutA. 5 percentB. 10 percentC. 15 percentD. 20 percent

Expert Solution
Summary Introduction

Introduction:

Diffusing capacity or transfer factor is the measure of the transfer of gas from air in the lungs to the red blood cells. It progressively decreases after 20 years of age.

### Explanation of Solution

Option (D) states that over the course of one’s life, the diffusion capacity decreases by about 20 percent (%). This is a true statement, as after the age of 20, the diffusing capacity decreases. It falls about 20% over the period of adulthood, at a rate of 2 milliliter per minute per millimeter of mercury. This occurs due to the decreased pulmonary capillary blood flow. Hence, option (D) is correct.

Option (A) states that over the course of life, the diffusion capacity decreases by about 5 %...

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