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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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Chapter
Section
BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

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

With advancing age, the

1. Lung compliance decreases

2. Chest wall compliance increases

3. Lung compliance increases

4. Chest wall compliance decreases

A. 2 only

B. 3 only

C. 1 and 2 only

D. 3 and 4 only

Summary Introduction

Introduction:

During the process of aging, irreversible changes occur in organs despite optimal nutrition, genetic background, and surroundings. All functions of the body deteriorate as the person ages and the organs are affected by age.

Explanation

Justification for the correct answer:

Option (D) states that with advancing age, the lung compliance increases and the chest wall compliance decreases (options 3 and 4). This is a true statement, as the person ages, the lung compliance, which is the lung’s ability to stretch and expand, increases due to the lack in elastic recoil of the lungs. This happens due to the enlargement of the alveoli after the age of 30.

Option 4 is also correct, as with age, the chest wall compliance decreases. The chest wall develops certain limitations with age, as the costal cartilages progressively calcify causing the ribs to slant downwards. Thus, the thorax becomes less compliant. These changes affect the trans-pulmonary pressure difference and hence the airways are not able to stay open for long. All this causes the chest wall compliance to be greater than the increase in lung compliance, which results in total compliance of the respiratory system to decrease. Hence, option (D) is correct.

Justification for the incorrect answers:

Option (A) states that (2 only) with advancing age, the chest wall compliance increases...

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