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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

Which action is performed by the anconeus muscle at the elbow joint?

Extension of the elbow

Pronation of the forearm

Supination of the forearm

Flexion of the elbow

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location and function of the anconeus muscle. The anconeus is a small triangular muscle located at the posterior aspect of the elbow joint, connecting the lateral epicondyle of the humerus to the ulna.

Step 2: Understand the primary action of the anconeus muscle. It assists the triceps brachii in extending the elbow joint by stabilizing the elbow during extension movements.

Step 3: Eliminate options that do not align with the function of the anconeus muscle. For example, pronation and supination of the forearm involve muscles like the pronator teres and supinator, not the anconeus.

Step 4: Consider flexion of the elbow. Flexion is performed by muscles such as the biceps brachii and brachialis, which are located anteriorly, whereas the anconeus is posterior and contributes to extension.

Step 5: Conclude that the correct action performed by the anconeus muscle is extension of the elbow joint, as it works synergistically with the triceps brachii to achieve this movement.