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

4. Tissues & Histology

Types of Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Types of Muscle Tissue

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Multiple Choice

Myoglobin would be most abundant in which type of muscle fiber?

Type IIa (fast oxidative) fibers

Type I (slow-twitch) fibers

Cardiac muscle fibers

Type IIb (fast glycolytic) fibers

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Verified step by step guidance

Understand the role of myoglobin: Myoglobin is a protein that binds oxygen in muscle cells, facilitating oxygen transport and storage, which is crucial for sustained muscle activity.

Identify the characteristics of Type I (slow-twitch) fibers: These fibers are designed for endurance and continuous, extended muscle contractions. They rely heavily on aerobic metabolism, which requires a steady supply of oxygen.

Recognize the relationship between myoglobin and Type I fibers: Since Type I fibers depend on aerobic respiration, they have a high concentration of myoglobin to store and transport oxygen efficiently, supporting prolonged activity.

Compare with other muscle fiber types: Type IIa fibers are fast oxidative and have moderate myoglobin content, while Type IIb fibers are fast glycolytic with low myoglobin content, as they rely more on anaerobic metabolism.

Conclude that Type I fibers have the highest myoglobin content due to their reliance on oxygen for sustained energy production, making them the most abundant in myoglobin among the options provided.