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

Pyruvate Oxidation

Anatomy & Physiology

3. Energy & Cell Processes

Pyruvate Oxidation

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Multiple Choice

Which one of the following is formed as pyruvate is converted to acetyl CoA during pyruvate oxidation?

NADH

ATP

Lactic acid

FADH2

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Verified step by step guidance

Understand the process of pyruvate oxidation, which occurs in the mitochondria after glycolysis. Pyruvate, a three-carbon molecule, is converted into acetyl CoA, a two-carbon molecule, in preparation for the citric acid cycle.

Recognize that during the conversion of pyruvate to acetyl CoA, a molecule of carbon dioxide (CO2) is released as a byproduct. This is a decarboxylation reaction.

Identify that during this conversion, electrons are transferred to NAD+ (nicotinamide adenine dinucleotide), reducing it to NADH. This is an important step as NADH will carry electrons to the electron transport chain.

Note that ATP is not directly produced during the conversion of pyruvate to acetyl CoA. Instead, the energy captured in NADH will be used later in the electron transport chain to produce ATP.

Understand that lactic acid and FADH2 are not products of pyruvate oxidation. Lactic acid is produced during anaerobic respiration, and FADH2 is produced later in the citric acid cycle, not during the conversion of pyruvate to acetyl CoA.