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

What is the primary action of the pronator teres muscle?

Extension of the elbow

Pronation of the forearm

Supination of the forearm

Flexion of the wrist

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Verified step by step guidance

Understand the anatomy of the pronator teres muscle: The pronator teres is located in the forearm and is part of the anterior compartment. It originates from the medial epicondyle of the humerus and the coronoid process of the ulna, and inserts onto the lateral surface of the radius.

Review the primary function of the pronator teres muscle: Its main action is to rotate the forearm so that the palm faces downward, a movement known as pronation.

Eliminate incorrect options based on the muscle's function: Extension of the elbow and flexion of the wrist are not actions performed by the pronator teres, as these movements involve different muscle groups.

Differentiate between pronation and supination: Pronation refers to the inward rotation of the forearm (palm down), while supination refers to the outward rotation (palm up). The pronator teres is responsible for pronation, not supination.

Conclude that the correct answer is 'Pronation of the forearm,' as this aligns with the primary action of the pronator teres muscle.