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 does the citric acid cycle take place in the cells of eukaryotic organisms?

Endoplasmic reticulum

Cytoplasm

Mitochondrial matrix

Nucleus

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Understand the role of the citric acid cycle, also known as the Krebs cycle, in cellular respiration. It is a key metabolic pathway that generates energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins into carbon dioxide and chemical energy in the form of ATP.

Identify the location of the citric acid cycle within the cell. In eukaryotic cells, this cycle occurs in the mitochondrial matrix, which is the innermost compartment of the mitochondria.

Recognize the structure of mitochondria. Mitochondria have two membranes: an outer membrane and a highly folded inner membrane. The space enclosed by the inner membrane is the matrix, where the enzymes of the citric acid cycle are located.

Differentiate the mitochondrial matrix from other cellular locations such as the cytoplasm, endoplasmic reticulum, and nucleus. The cytoplasm is where glycolysis occurs, the endoplasmic reticulum is involved in protein and lipid synthesis, and the nucleus houses the cell's genetic material.

Conclude that the mitochondrial matrix is the correct location for the citric acid cycle, as it contains the necessary enzymes and conditions for the cycle to proceed efficiently.