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

Gluconeogenesis

Anatomy & Physiology

24. Metabolism and Nutrition

Gluconeogenesis

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Multiple Choice

Which enzyme is used both in gluconeogenesis and glycogenolysis?

Pyruvate kinase

Hexokinase

Glucose-6-phosphatase

Phosphofructokinase

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Verified step by step guidance

Understand the processes: Gluconeogenesis is the synthesis of glucose from non-carbohydrate sources, while glycogenolysis is the breakdown of glycogen into glucose.

Identify the role of enzymes: Enzymes are biological catalysts that speed up chemical reactions. Each step in metabolic pathways like gluconeogenesis and glycogenolysis is catalyzed by specific enzymes.

Focus on glucose-6-phosphatase: This enzyme is crucial in both gluconeogenesis and glycogenolysis. In gluconeogenesis, it catalyzes the final step, converting glucose-6-phosphate into free glucose. In glycogenolysis, it performs the same conversion, releasing glucose into the bloodstream.

Differentiate from other enzymes: Pyruvate kinase and hexokinase are involved in glycolysis, not gluconeogenesis or glycogenolysis. Phosphofructokinase is also a glycolytic enzyme, emphasizing the specificity of glucose-6-phosphatase in the mentioned pathways.

Conclude the enzyme's importance: Glucose-6-phosphatase is essential for maintaining blood glucose levels, especially during fasting, by facilitating the release of glucose from the liver.