Explanation The decrease in respiratory muscle strength with the age leads progressive decline in lung function. The two main reason for this declined lung capacity are as follows: 1. Aging is associated with the muscle and bone changes. The diaphragm of older people becomes weaker, thus decreasing the ability to inhale and exhale. Ribcage bones also becomes thinner and alteration in their shape may lead to lesser expansion and contraction during breathing...

5th Edition

ISBN: 9780321861580

Author: Marieb, Elaine N.

Publisher: Pearson College Div

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Question

Chapter 21, Problem 24CYU

Summary Introduction

To review:

The two reasons for the decline in vital capacity with the increasing age.

Introduction:

The vital capacity is defined as the maximum amount of the air expelled by a person after a maximum inhalation. It is the sum of the of inspiratory reserve volume, tidal volume, and expiratory reserve volume. The vital capacity is maximum at the age of 20-25 years, when the lungs and respiratory muscle strength is well developed. After this, aging is associated with the functioning of the lungs and vital capacity decline with the age.

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Chapter 21, Problem 23CYU

Chapter 21, Problem 1RQ

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Chapter 21 Solutions

Anatomy & Physiology

Ch. 21 - Prob. 1CYU Ch. 21 - Which structure seals the larynx when we swallow?Ch. 21 - Which structural features of the trachea allow it...Ch. 21 - What features of the alveoli and their respiratory...Ch. 21 - A 3-year-old boy is brought to the emergency...Ch. 21 - The lungs are perfused by two different...Ch. 21 - What is the driving force for pulmonary...Ch. 21 - What causes the intrapulmonary pressure to...Ch. 21 - What causes the partial vacuum (negative pressure)...Ch. 21 - Prob. 10CYU

Ch. 21 - Premature infants often lack adequate surfactant....Ch. 21 - Explain why slow, deep breaths ventilate the...Ch. 21 - You are given a sealed container of water and air....Ch. 21 - PO2 in the alveoli is about 56 mm Hg lower than in...Ch. 21 - Suppose a patient is receiving oxygen by mask. Are...Ch. 21 - Rapidly metabolizing tissues generate large...Ch. 21 - Prob. 17CYU Ch. 21 - What is the relationship between CO2 and pH in the...Ch. 21 - Which brain stem respiratory area is thought to...Ch. 21 - Prob. 20CYU Ch. 21 - An injured soccer player arrives by ambulance in...Ch. 21 - Prob. 22CYU Ch. 21 - What distinguishes the obstruction in asthma from...Ch. 21 - Prob. 24CYU Ch. 21 - Cutting the phrenic nerves will result in (a) air...Ch. 21 - Which of the following laryngeal cartilages is/are...Ch. 21 - Prob. 3RQ Ch. 21 - The detergent-like substance that keeps the...Ch. 21 - Which of the following determines the direction of...Ch. 21 - When the inspiratory muscles contract, (a) the...Ch. 21 - The nutrient blood supply of the lungs is provided...Ch. 21 - Oxygen and carbon dioxide are exchanged in the...Ch. 21 - Which of the following would not normally be...Ch. 21 - Most oxygen carried in the blood is (a) in...Ch. 21 - Which of the following has the greatest...Ch. 21 - In mouth-to-mouth artificial respiration, the...Ch. 21 - Prob. 13RQ Ch. 21 - Prob. 14RQ Ch. 21 - Damage to which of the following would most likely...Ch. 21 - Prob. 16RQ Ch. 21 - Trace the route of air from the nares to an...Ch. 21 - (a) Why is it important that the trachea is...Ch. 21 - Briefly explain the anatomical reason why most men...Ch. 21 - The lungs are mostly passageways and elastic...Ch. 21 - Describe the functional relationships between...Ch. 21 - Discuss how airway resistance, lung compliance,...Ch. 21 - (a) Differentiate clearly between minute...Ch. 21 - Prob. 24RQ Ch. 21 - (a) Define hyperventilation. (b) If you...Ch. 21 - Prob. 1CCS Ch. 21 - Prob. 2CCS Ch. 21 - Barbara Joley was in the bus that was hit...Ch. 21 - Barbara Joley was in the bus that was hit...Ch. 21 - Prob. 5CCS Ch. 21 - Prob. 6CCS Ch. 21 - Prob. 7CCS

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Solution Summary: The author explains the two main reasons for the decline in vital capacity with the increasing age.

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