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 Cellular Respiration

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to Cellular Respiration

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Multiple Choice

What is produced by the liver and used as an energy source when glucose is not readily available?

Ketone bodies

Lactic acid

Glycogen

Insulin

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Verified step by step guidance

Understand the role of the liver in metabolism: The liver is a key organ in regulating energy sources in the body, especially during fasting or low carbohydrate intake.

Identify the process of ketogenesis: When glucose is scarce, the liver converts fatty acids into ketone bodies through a process called ketogenesis. This occurs primarily in the mitochondria of liver cells.

Recognize the types of ketone bodies: The main ketone bodies produced are acetoacetate, beta-hydroxybutyrate, and acetone. These can be used by various tissues, including the brain, as an alternative energy source.

Differentiate between ketone bodies and other substances: Lactic acid is produced during anaerobic respiration, glycogen is a stored form of glucose, and insulin is a hormone regulating blood glucose levels. None of these are produced by the liver as an alternative energy source when glucose is low.

Conclude the liver's role in energy production: During periods of low glucose availability, the liver's production of ketone bodies is crucial for maintaining energy supply to vital organs.