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

Structure of a Skeletal Muscle

Anatomy & Physiology

9. Muscle Tissue

Structure of a Skeletal Muscle

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Multiple Choice

Which of the following correctly describes the hierarchical organization of a skeletal muscle from largest to smallest structure?

Myofibril > Muscle fiber > Fascicle > Muscle

Muscle fiber > Fascicle > Muscle > Myofibril

Fascicle > Muscle > Myofibril > Muscle fiber

Muscle > Fascicle > Muscle fiber > Myofibril

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Verified step by step guidance

Step 1: Begin by understanding the hierarchical organization of skeletal muscle, which is structured from the largest to the smallest components. This organization reflects how muscles are composed of smaller subunits that work together to facilitate contraction and movement.

Step 2: Start with the largest structure, the muscle itself. A muscle is composed of bundles of smaller units called fascicles, which are surrounded by connective tissue called the perimysium.

Step 3: Within each fascicle, there are individual muscle fibers (also known as muscle cells). These muscle fibers are surrounded by another layer of connective tissue called the endomysium.

Step 4: Inside each muscle fiber, there are even smaller structures called myofibrils. Myofibrils are the contractile units of the muscle and are composed of repeating sarcomeres, which contain actin and myosin filaments responsible for muscle contraction.

Step 5: To summarize, the correct hierarchical organization from largest to smallest is: Muscle > Fascicle > Muscle fiber > Myofibril. This sequence reflects the structural arrangement of skeletal muscle.