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

24. Metabolism and Nutrition

Cellular Respiration: Pyruvate Oxidation

Anatomy & Physiology

24. Metabolism and Nutrition

Cellular Respiration: Pyruvate Oxidation

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Multiple Choice

What happens to the acetyl-CoA that is produced from pyruvate during cellular respiration?

It is converted back into pyruvate for glycolysis.

It enters the citric acid cycle to be further oxidized.

It is directly used to synthesize ATP in the cytoplasm.

It is stored as glycogen in the liver.

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Verified step by step guidance

Understand the role of acetyl-CoA in cellular respiration: Acetyl-CoA is a crucial molecule that acts as a substrate for the citric acid cycle, also known as the Krebs cycle.

Recognize the process of pyruvate conversion: Pyruvate, produced during glycolysis, is transported into the mitochondria where it is converted into acetyl-CoA by the enzyme pyruvate dehydrogenase.

Identify the entry of acetyl-CoA into the citric acid cycle: Once formed, acetyl-CoA enters the citric acid cycle, where it combines with oxaloacetate to form citrate, initiating a series of reactions that lead to the production of electron carriers NADH and FADH2.

Clarify the role of the citric acid cycle: The citric acid cycle is a central metabolic pathway that further oxidizes acetyl-CoA, releasing carbon dioxide and transferring high-energy electrons to NAD+ and FAD, forming NADH and FADH2.

Explain the importance of electron carriers: NADH and FADH2 produced in the citric acid cycle are used in the electron transport chain to generate ATP, the energy currency of the cell, through oxidative phosphorylation.