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

Electron Transport Chain

Anatomy & Physiology

3. Energy & Cell Processes

Electron Transport Chain

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Multiple Choice

In the electron transport chain, the final electron acceptor is:

H₂O.

CO₂.

O₂.

NAD⁺.

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Verified step by step guidance

Understand the context: The electron transport chain (ETC) is the final stage of cellular respiration, occurring in the inner mitochondrial membrane, where electrons are transferred through a series of protein complexes.

Identify the role of the final electron acceptor: In the ETC, electrons are passed along the chain and ultimately need to be accepted by a molecule to complete the process.

Recognize the importance of oxygen: Oxygen (O2) is the final electron acceptor in the electron transport chain. It combines with electrons and protons to form water (H2O), which is a byproduct of this process.

Eliminate incorrect options: H2O is a product, not an acceptor. CO2 is involved in the citric acid cycle, not the ETC. NAD+ is an electron carrier, not the final acceptor.

Conclude with the correct answer: Oxygen (O2) is the correct and essential final electron acceptor in the electron transport chain, enabling the production of ATP through oxidative phosphorylation.