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

Introduction to Lung Physiology

Anatomy & Physiology

22. The Respiratory System

Introduction to Lung Physiology

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Multiple Choice

Most physiological measures are taken during eupnea, or quiet breathing. This means that:

Ventilation is a passive process that does not use muscular force.

Muscular force is used for inspiration but not expiration.

Muscular force is used for expiration but not inspiration.

Muscular force is used for both inspiration and expiration.

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Verified step by step guidance

Understand the concept of eupnea, which refers to normal, quiet breathing that occurs at rest.

Recognize that during eupnea, the process of inspiration (inhaling) involves the contraction of the diaphragm and intercostal muscles, which requires muscular force.

Acknowledge that expiration (exhaling) during eupnea is typically a passive process, where the muscles relax and the elastic recoil of the lungs and thoracic cage expels air without active muscular contraction.

Differentiate between the active process of inspiration and the passive process of expiration during eupnea.

Conclude that during eupnea, muscular force is used for inspiration but not for expiration, aligning with the physiological understanding of quiet breathing.