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

What happens to muscle cells if they deplete their supply of oxygen and ATP?

They increase the production of creatine phosphate.

They stop contracting and enter a state of rigor mortis.

They switch to anaerobic metabolism, producing lactic acid.

They continue aerobic respiration without any changes.

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Verified step by step guidance

Understand the role of oxygen and ATP in muscle cell function: Oxygen is crucial for aerobic respiration, which produces ATP, the energy currency of the cell. ATP is necessary for muscle contraction and relaxation.

Recognize the consequences of oxygen depletion: When muscle cells lack oxygen, they cannot perform aerobic respiration efficiently, leading to reduced ATP production.

Explore alternative energy pathways: In the absence of sufficient oxygen, muscle cells switch to anaerobic metabolism to generate ATP. This process does not require oxygen but is less efficient and results in the production of lactic acid.

Consider the effects of anaerobic metabolism: The accumulation of lactic acid can lead to muscle fatigue and soreness, as it lowers the pH within the muscle cells.

Clarify why other options are incorrect: Creatine phosphate is a short-term energy reserve but does not increase production in response to oxygen depletion. Rigor mortis occurs post-mortem, not during oxygen depletion. Aerobic respiration cannot continue without oxygen.