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 statements accurately describes transpulmonary pressure?

It is the pressure difference between the intrapleural pressure and the atmospheric pressure.

It is the pressure difference between the atmospheric pressure and the alveolar pressure.

It is the pressure difference between the alveolar pressure and the intrapleural pressure.

It is the pressure difference between the alveolar pressure and the blood pressure in the pulmonary capillaries.

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Verified step by step guidance

Understand the concept of transpulmonary pressure: Transpulmonary pressure is the difference between the alveolar pressure and the intrapleural pressure. It is crucial for keeping the lungs inflated and is a key factor in the mechanics of breathing.

Identify the pressures involved: Alveolar pressure is the pressure within the alveoli, the tiny air sacs in the lungs where gas exchange occurs. Intrapleural pressure is the pressure within the pleural cavity, the space between the lung and the chest wall.

Recognize the role of transpulmonary pressure: This pressure difference is essential for lung expansion during inhalation. A positive transpulmonary pressure indicates that the alveolar pressure is greater than the intrapleural pressure, allowing the lungs to expand.

Differentiate from other pressures: Atmospheric pressure is the pressure exerted by the weight of the air in the atmosphere. Blood pressure in the pulmonary capillaries is the pressure of blood within the small vessels in the lungs. Neither of these is directly involved in calculating transpulmonary pressure.

Apply the concept: To determine transpulmonary pressure, subtract the intrapleural pressure from the alveolar pressure. This can be expressed mathematically as: