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

3. Energy & Cell Processes

Glycolysis

Anatomy & Physiology

3. Energy & Cell Processes

Glycolysis

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Multiple Choice

What primarily determines the direction of respiratory gas movement across the respiratory membrane?

Partial pressure gradients of the gases

The thickness of the alveolar wall

The presence of surfactant in the alveoli

The temperature of inspired air

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Verified step by step guidance

Understand the concept of respiratory gas exchange: Gas exchange in the lungs occurs across the respiratory membrane, which consists of the alveolar epithelium, the capillary endothelium, and their fused basement membranes. This process is driven by differences in partial pressures of gases.

Learn about partial pressure gradients: Partial pressure is the pressure exerted by a single gas in a mixture of gases. Gases move from areas of higher partial pressure to areas of lower partial pressure, following the principles of diffusion.

Examine the role of the respiratory membrane: The thinness of the respiratory membrane facilitates efficient gas exchange, but the primary determinant of gas movement direction is the partial pressure gradient, not the thickness of the membrane.

Consider the role of surfactant: Surfactant reduces surface tension in the alveoli, preventing collapse and aiding in gas exchange, but it does not directly determine the direction of gas movement.

Evaluate the impact of temperature: While temperature can influence the solubility of gases, it is not the primary factor determining the direction of respiratory gas movement. The partial pressure gradient remains the key determinant.