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 Heart2h 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 represents the major energy-related accomplishment of the citric acid cycle, even though it is not the only energy-related accomplishment?

Formation of CO₂

Formation of ATP

Utilization of O₂

Completion of substrate-level phosphorylation

Formation of NADH and FADH₂

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Verified step by step guidance

Begin by understanding the role of the citric acid cycle (also known as the Krebs cycle) in cellular respiration. It is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide.

Recognize that the citric acid cycle occurs in the mitochondria and is a crucial part of the metabolic pathway that provides high-energy electron carriers for the electron transport chain.

Identify the main products of the citric acid cycle. While ATP is produced, the cycle's major energy-related accomplishment is the generation of reduced electron carriers: NADH and FADH2.

Understand that NADH and FADH2 are essential because they carry high-energy electrons to the electron transport chain, where their energy is used to produce ATP through oxidative phosphorylation.

Conclude that the formation of NADH and FADH2 is the major energy-related accomplishment of the citric acid cycle, as these molecules are pivotal in driving the production of ATP in the subsequent stages of cellular respiration.