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

Introduction to Muscle Tissue

Anatomy & Physiology

4. Tissues & Histology

Introduction to Muscle Tissue

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Multiple Choice

What is the name for the many parallel threads that make up a single muscle fiber?

Sarcomeres

Fascicles

Myofilaments

Myofibrils

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Verified step by step guidance

Step 1: Begin by understanding the structure of a muscle fiber. A muscle fiber is a single muscle cell, and it is composed of smaller thread-like structures that run parallel to each other.

Step 2: Learn the hierarchy of muscle organization. Muscle fibers are made up of myofibrils, which are the many parallel threads within the fiber. Myofibrils contain the contractile units of the muscle.

Step 3: Differentiate between the terms provided in the question. Sarcomeres are the functional units of contraction within myofibrils. Fascicles are bundles of muscle fibers, not threads within a single fiber. Myofilaments are the protein filaments (actin and myosin) within sarcomeres, not the threads that make up the fiber.

Step 4: Recognize that myofibrils are the correct answer because they are the structures that make up a single muscle fiber and contain the sarcomeres where contraction occurs.

Step 5: To reinforce understanding, visualize the muscle structure hierarchy: muscle → fascicle → muscle fiber → myofibril → sarcomere → myofilaments (actin and myosin).