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: Electron Transport Chain

Anatomy & Physiology

24. Metabolism and Nutrition

Cellular Respiration: Electron Transport Chain

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Multiple Choice

Which fuel substrates are primarily used to produce ATP by oxidative phosphorylation in skeletal muscle fibers?

Glycogen and creatine phosphate

Lactate and pyruvate

Glucose and fatty acids

Amino acids and nucleotides

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Verified step by step guidance

Understand that ATP production in skeletal muscle fibers occurs through oxidative phosphorylation, a process that takes place in the mitochondria and requires oxygen.

Recognize that oxidative phosphorylation primarily uses substrates that can be oxidized to produce energy. These substrates are typically carbohydrates and fats.

Identify that glucose, a carbohydrate, is a primary substrate for ATP production. It undergoes glycolysis to form pyruvate, which enters the mitochondria for further oxidation.

Acknowledge that fatty acids are another major substrate. They undergo beta-oxidation in the mitochondria to produce acetyl-CoA, which enters the citric acid cycle, leading to ATP production.

Conclude that glucose and fatty acids are the primary fuel substrates used in oxidative phosphorylation in skeletal muscle fibers, as they provide the necessary acetyl-CoA for the citric acid cycle and subsequent ATP production.