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

Which type of muscle fibers are best suited for running a marathon?

Type I (slow-twitch) fibers

Type III (intermediate) fibers

Type IIb (fast-twitch glycolytic) fibers

Type IIa (fast-twitch oxidative) fibers

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Verified step by step guidance

Understand the different types of muscle fibers: Type I (slow-twitch), Type IIa (fast-twitch oxidative), Type IIb (fast-twitch glycolytic), and Type III (intermediate). Each type has unique characteristics suited for different activities.

Type I fibers are known for their endurance capabilities. They are rich in mitochondria, have a high capacity for aerobic metabolism, and are fatigue-resistant, making them ideal for long-duration activities like marathons.

Type IIa fibers are fast-twitch but have more oxidative capacity than Type IIb fibers. They can sustain activity longer than Type IIb fibers and are used in activities that require both power and endurance.

Type IIb fibers are fast-twitch glycolytic fibers, which are designed for short bursts of power and speed. They fatigue quickly and are not suited for endurance activities like marathons.

Evaluate the requirements of running a marathon, which is a long-duration, endurance-based activity. The muscle fibers best suited for this are Type I fibers due to their endurance and fatigue resistance.