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

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Most skeletal muscles contain which of the following types of muscle fibers?

only fast glycolytic fibers

a mixture of fiber types

only slow oxidative fibers

only cardiac muscle fibers

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Verified step by step guidance

Understand the types of muscle fibers: Skeletal muscles are composed of three main types of muscle fibers—slow oxidative (Type I), fast oxidative-glycolytic (Type IIa), and fast glycolytic (Type IIb). Each type has distinct characteristics related to contraction speed, fatigue resistance, and energy metabolism.

Recognize the functional diversity of skeletal muscles: Skeletal muscles are designed to perform a variety of tasks, from maintaining posture to generating powerful movements. This functional diversity requires a mixture of fiber types to meet different demands.

Learn the distribution of muscle fibers: Most skeletal muscles contain a combination of slow oxidative fibers for endurance activities, fast oxidative-glycolytic fibers for moderate-intensity activities, and fast glycolytic fibers for short bursts of high-intensity activity.

Understand why cardiac muscle fibers are not present: Cardiac muscle fibers are specialized for the heart and are not found in skeletal muscles. Skeletal muscles are voluntary, while cardiac muscles are involuntary and have unique structural and functional properties.

Conclude that skeletal muscles contain a mixture of fiber types: The presence of different fiber types allows skeletal muscles to adapt to various physical activities and energy demands, making them versatile and efficient.