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

Which of the following correctly lists the two main stages of pulmonary ventilation?

Osmosis and absorption

Diffusion and filtration

Inspiration and expiration

Conduction and convection

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Verified step by step guidance

Understand the concept of pulmonary ventilation: Pulmonary ventilation refers to the process of moving air into and out of the lungs, which is essential for gas exchange in the respiratory system.

Identify the two main stages of pulmonary ventilation: These stages are inspiration (inhalation) and expiration (exhalation). Inspiration involves drawing air into the lungs, while expiration involves expelling air from the lungs.

Clarify the mechanisms involved in inspiration: During inspiration, the diaphragm contracts and moves downward, while the external intercostal muscles contract to expand the rib cage. This increases the thoracic cavity's volume, reducing pressure and allowing air to flow into the lungs.

Clarify the mechanisms involved in expiration: During expiration, the diaphragm relaxes and moves upward, and the external intercostal muscles relax, causing the rib cage to return to its resting position. This decreases the thoracic cavity's volume, increasing pressure and pushing air out of the lungs.

Compare the incorrect options: Osmosis and absorption, diffusion and filtration, and conduction and convection are unrelated to pulmonary ventilation. These terms describe other physiological processes, such as fluid movement or heat transfer, and do not apply to the stages of breathing.