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

Fermentation & Anaerobic Respiration

Anatomy & Physiology

3. Energy & Cell Processes

Fermentation & Anaerobic Respiration

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Multiple Choice

In glycolysis in the absence of oxygen, cells need a way to regenerate which compound?

Ethanol

Carbon dioxide

Lactate

Glucose

NAD⁺

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Verified step by step guidance

Understand the process of glycolysis: Glycolysis is the metabolic pathway that converts glucose into pyruvate, releasing energy and producing ATP and NADH in the process.

Recognize the role of NAD+ in glycolysis: During glycolysis, NAD+ is reduced to NADH as it accepts electrons. This is crucial for the continuation of glycolysis as NAD+ is needed to accept electrons again.

Identify the problem in anaerobic conditions: In the absence of oxygen, the electron transport chain cannot function, and NADH cannot be oxidized back to NAD+ through oxidative phosphorylation.

Explore alternative pathways: Cells use fermentation to regenerate NAD+. In lactic acid fermentation, pyruvate is reduced to lactate, regenerating NAD+ from NADH, allowing glycolysis to continue.

Conclude the importance of NAD+ regeneration: The regeneration of NAD+ is essential for glycolysis to proceed in anaerobic conditions, ensuring that ATP production can continue even without oxygen.