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

Which of the following factors primarily determines lung compliance?

Number of alveoli

Rate of breathing

Elasticity of lung tissue

Partial pressure of oxygen

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Verified step by step guidance

Understand the concept of lung compliance: Lung compliance refers to the ability of the lungs to stretch and expand during breathing. It is influenced by the physical properties of the lung tissue and surrounding structures.

Identify the primary factor affecting lung compliance: Elasticity of lung tissue is the key determinant of lung compliance. Elastic fibers in the lung tissue allow the lungs to recoil after stretching, which is essential for normal breathing.

Eliminate incorrect options: The number of alveoli does not directly affect lung compliance, as compliance is more about the stretchability of the lung tissue rather than the quantity of alveoli. Similarly, the rate of breathing is a functional aspect of respiration, not a structural determinant of compliance. Partial pressure of oxygen relates to gas exchange, not the mechanical property of lung compliance.

Relate elasticity to lung compliance: Reduced elasticity (e.g., in conditions like emphysema) leads to increased compliance, making the lungs overly stretchy but less effective at recoiling. Conversely, increased elasticity (e.g., in fibrosis) decreases compliance, making the lungs stiffer and harder to expand.

Summarize the importance of elasticity: Elasticity of lung tissue is the primary factor that determines lung compliance because it governs the ability of the lungs to stretch during inhalation and recoil during exhalation, ensuring efficient ventilation.