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

Which of the following processes generates a proton-motive force in mitochondria?

Glycolysis in the cytoplasm

ATP synthesis by ATP synthase

Electron transport through complexes I, III, and IV

Krebs cycle in the mitochondrial matrix

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Verified step by step guidance

Understand the concept of proton-motive force: It is the force generated across the inner mitochondrial membrane due to the movement of protons (H⁺ ions) from the mitochondrial matrix to the intermembrane space.

Identify the role of the electron transport chain: The electron transport chain consists of complexes I, III, and IV, which are integral membrane proteins located in the inner mitochondrial membrane.

Recognize the function of these complexes: As electrons are transferred through these complexes, protons are pumped from the mitochondrial matrix into the intermembrane space, creating a gradient.

Explain the significance of the proton gradient: This gradient creates a potential energy difference across the membrane, known as the proton-motive force, which is essential for ATP synthesis.

Clarify why other processes do not generate this force: Glycolysis occurs in the cytoplasm and does not involve the mitochondrial membrane, ATP synthesis uses the proton-motive force but does not generate it, and the Krebs cycle occurs in the matrix without creating a proton gradient.