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

Krebs Cycle

Anatomy & Physiology

3. Energy & Cell Processes

Krebs Cycle

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Multiple Choice

Where in the cell does the Krebs cycle occur?

Cytoplasm

Mitochondrial matrix

Nucleus

Endoplasmic reticulum

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Verified step by step guidance

Understand the context of the Krebs cycle: The Krebs cycle, also known as the citric acid cycle, is a series of chemical reactions used by all aerobic organisms to generate energy through the oxidation of acetate derived from carbohydrates, fats, and proteins into carbon dioxide.

Identify the location of the Krebs cycle: The Krebs cycle takes place in the mitochondria, which are known as the powerhouses of the cell due to their role in energy production.

Differentiate between cellular locations: The cytoplasm is the gel-like substance within the cell membrane, the nucleus contains the cell's genetic material, and the endoplasmic reticulum is involved in protein and lipid synthesis. None of these are involved in the Krebs cycle.

Focus on the mitochondrial structure: The mitochondria have two membranes, and the space inside the inner membrane is called the mitochondrial matrix. This is where the Krebs cycle occurs.

Conclude with the correct location: Based on the understanding of cellular structures and functions, the Krebs cycle occurs in the mitochondrial matrix, not in the cytoplasm, nucleus, or endoplasmic reticulum.