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

Introduction to Metabolism

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to Metabolism

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Multiple Choice

What is the primary source of fuel for the brain during normal physiological conditions?

Amino acids

Lactate

Glucose

Fatty acids

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Verified step by step guidance

Understand that the brain requires a constant supply of energy to function properly, and this energy is primarily derived from metabolic substrates.

Recognize that under normal physiological conditions, the brain relies on glucose as its main source of energy. This is because glucose can cross the blood-brain barrier efficiently.

Consider the role of other potential energy sources: amino acids, lactate, and fatty acids. While these can be used by other tissues, they are not the primary fuel for the brain under normal conditions.

Amino acids are primarily used for protein synthesis and not as a main energy source for the brain.

Fatty acids are not used by the brain as a primary energy source because they do not cross the blood-brain barrier effectively. Lactate can be used during intense exercise or starvation, but glucose remains the primary fuel under normal conditions.