Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

22. The Respiratory System

Lung Volumes and Capacities

Anatomy & Physiology

22. The Respiratory System

Lung Volumes and Capacities

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Multiple Choice

What does expiratory reserve volume (ERV) measure?

The maximum volume of air that can be exhaled after a normal exhalation

The volume of air remaining in the lungs after a maximal exhalation

The total volume of air that can be inhaled after a normal inhalation

The total volume of air that can be exhaled after a maximal inhalation

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Verified step by step guidance

Understand the concept of lung volumes: Lung volumes are measurements that reflect the amount of air in the lungs during different phases of the respiratory cycle.

Define expiratory reserve volume (ERV): ERV is the maximum volume of air that can be exhaled forcefully after the end of a normal tidal exhalation.

Differentiate ERV from other lung volumes: ERV is distinct from residual volume (RV), which is the air remaining in the lungs after maximal exhalation, and inspiratory reserve volume (IRV), which is the additional air that can be inhaled after a normal inhalation.

Identify the correct description of ERV: ERV specifically measures the additional air that can be exhaled after a normal exhalation, not the total air exhaled after maximal inhalation or the air remaining after maximal exhalation.

Apply this understanding to the given options: The correct answer is the option that describes ERV as the maximum volume of air that can be exhaled after a normal exhalation.