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Ch. 21 The Respiratory System
Amerman - Human Anatomy & Physiology 2nd Edition
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822Not the one you use?Change textbook
All textbooksAmerman 2nd EditionCh. 21 The Respiratory SystemProblem 10b
Chapter 21, Problem 10b

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The tidal volume is the amount of air left in the lungs after maximal expiration.

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1
Step 1: Understand the term 'tidal volume'. Tidal volume refers to the amount of air inhaled or exhaled during a normal, resting breath. It is not related to the air left in the lungs after maximal expiration.
Step 2: Identify the term that describes the air left in the lungs after maximal expiration. This is called the 'residual volume', not tidal volume.
Step 3: Evaluate the given statement. The statement is false because it incorrectly defines tidal volume as the air left in the lungs after maximal expiration.
Step 4: Correct the false statement. The corrected statement should read: 'The tidal volume is the amount of air inhaled or exhaled during a normal, resting breath.'
Step 5: Review the corrected statement and ensure it aligns with the proper definitions of tidal volume and residual volume in respiratory physiology.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Tidal Volume

Tidal volume refers to the amount of air that is inhaled or exhaled during normal breathing. It is a key component of respiratory physiology and is typically measured in milliliters. Understanding tidal volume is essential for assessing lung function and overall respiratory health.
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Lung Volumes

Lung volumes are measurements that describe the different capacities of the lungs, including tidal volume, residual volume, and vital capacity. Each volume plays a role in understanding how the lungs function during various activities, such as rest and exercise. Knowing these volumes helps in diagnosing and managing respiratory conditions.
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Residual Volume

Residual volume is the amount of air that remains in the lungs after a maximal exhalation. It prevents the lungs from collapsing and ensures that gas exchange can continue even between breaths. This concept is crucial for understanding lung mechanics and the overall respiratory system.
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Related Practice
Textbook Question

Which of the following does not affect the efficiency of pulmonary gas exchange?

a. The surface area of the respiratory membrane

b. The degree of match of ventilation to perfusion

c. The percent saturation of hemoglobin

d. The thickness of the respiratory membrane

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Textbook Question

Which of the following statements about pulmonary ventilation is false?

a. Normal expiration requires the use of the expiratory muscles to decrease lung volume.

b. The inspiratory muscles increase lung volume, which decreases intrapulmonary pressure.

c. For inspiration to occur, intrapulmonary pressure must decrease below atmospheric pressure.

d. The intrapleural pressure is less than the intrapulmonary pressure; this prevents the lungs from collapsing during expiration.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The vital capacity is the total amount of exchangeable air.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The inspiratory capacity is equal to the vital capacity plus the tidal volume.

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Textbook Question

Match each term with the correct definition. 

Airway resistance     

Surface tension     

Surfactant     

Pulmonary compliance     

V/Q ratio

a. A detergent-like chemical secreted by bronchial smooth muscle that reduces surface tension

b. The matching of ventilation to perfusion

c. Largely determined by the diameter of the airways

d. Caused by the formation of hydrogen bonds between water molecules

e. Determined by the surface tension of the alveoli, the elastic tissue of the lungs, and the condition of the chest wall

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

The functional residual capacity is the volume of air normally left in the lungs after a tidal expiration.

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