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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

As an individual ages, the

1. Forced vital capacity increases

2. Peak expiratory flow rate decreases

3. Forced expiratory volume in 1 second increases

4. Maximum voluntary ventilation increase

A. 1 only

B. 2 only

C. 2 and 4 only

D. 3 and 4 only

Summary Introduction

Introduction:

All functions of the body deteriorate as the person ages and the organs are affected with time. The lung functioning is affected similarly, as with time, lungs lose their elasticity and the dynamics of ventilation also have specific effects. The deterioration is observed with a decrease in dynamic lung functions.

Explanation

Justification for the correct answer:

Option (B) states that as an individual ages, the peak expiratory flow rate decreases (2 only). This is a true statement, as with age, the expiratory flow rate, which is the maximum speed of expiration, decreases as the expiration capacity diminishes with time. This occurs as a result of the changes of degenerative nature in the musculoskeletal system, which, in turn, leads to a decrease in the respiratory muscle strength. Hence, option (B) is correct.

Justification for the incorrect answers:

Option (A) states that (1 only) as an individual ages, the forced vital capacity increases. This is false, as with age, the forced vital capacity (FVC) decreases due to the physiological, anatomical, and immunological changes...

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