Table of contents

1. Introduction to Anatomy & Physiology5h 42m
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 Heart2h 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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

The extensor digitorum muscle is an example of a __________ muscle.

circular

convergent

pennate

fusiform

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Verified step by step guidance

Understand the types of muscle fiber arrangements: Circular muscles form rings and control openings, convergent muscles have a broad origin and converge to a single tendon, pennate muscles have fibers that attach obliquely to a central tendon, and fusiform muscles are spindle-shaped with a central belly.

Identify the function and structure of the extensor digitorum muscle: It is responsible for extending the fingers and is located in the forearm.

Recognize that the extensor digitorum muscle has a structure where muscle fibers attach obliquely to a central tendon, which is characteristic of a pennate muscle.

Differentiate between the types of pennate muscles: Unipennate muscles have fibers on one side of the tendon, bipennate have fibers on both sides, and multipennate have multiple rows of fibers attached to a central tendon.

Conclude that the extensor digitorum muscle is a pennate muscle due to its fiber arrangement, which allows for greater force production compared to parallel fiber arrangements.