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

Krebs Cycle

Anatomy & Physiology

3. Energy & Cell Processes

Krebs Cycle

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Multiple Choice

Which of the following does not occur during the citric acid cycle?

Release of carbon dioxide

Formation of FADH2

Oxidation of NADH to NAD+

Production of ATP

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Verified step by step guidance

Understand the citric acid cycle: The citric acid cycle, also known as the Krebs cycle, is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.

Identify the key processes in the citric acid cycle: During the cycle, acetyl-CoA is oxidized, carbon dioxide is released, and high-energy electron carriers such as NADH and FADH2 are produced. Additionally, a small amount of ATP (or GTP) is generated.

Examine the role of NADH and FADH2: In the citric acid cycle, NAD+ is reduced to form NADH, and FAD is reduced to form FADH2. These molecules carry electrons to the electron transport chain for further energy production.

Clarify the oxidation and reduction processes: Oxidation refers to the loss of electrons, while reduction refers to the gain of electrons. In the citric acid cycle, NAD+ is reduced to NADH, not oxidized.

Determine the incorrect statement: The statement 'Oxidation of NADH to NAD+' is incorrect in the context of the citric acid cycle, as NADH is not oxidized back to NAD+ during this cycle. Instead, NAD+ is reduced to NADH.