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

How does blood flow change in the lungs during exercise to support increased lung function?

Blood flow to the lungs increases to match the higher oxygen demand of the body.

Blood flow is redirected away from the lungs to the digestive system during exercise.

Blood flow to the lungs remains unchanged during exercise.

Blood flow to the lungs decreases because the muscles require more blood.

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Verified step by step guidance

Understand the physiological changes during exercise: During exercise, the body's demand for oxygen increases significantly to support the heightened activity of muscles. This requires adjustments in the cardiovascular and respiratory systems.

Focus on the role of the lungs: The lungs are responsible for oxygenating the blood and removing carbon dioxide. To meet the increased oxygen demand during exercise, the lungs must work more efficiently, which involves increased blood flow to the lungs.

Explain the mechanism of increased blood flow: During exercise, the heart pumps more blood (increased cardiac output), and pulmonary circulation adapts by increasing blood flow to the lungs. This ensures that more oxygen can be absorbed and delivered to the muscles.

Clarify why blood flow is not redirected away from the lungs: Blood flow to the lungs cannot decrease or remain unchanged during exercise because the lungs are critical for oxygen exchange. Blood flow is redirected away from non-essential systems, such as the digestive system, to prioritize oxygen delivery to active muscles and the lungs.

Conclude with the correct answer: Blood flow to the lungs increases during exercise to match the higher oxygen demand of the body. This is a key adaptation to support increased lung function and overall physical activity.