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

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Which of the following is a primary action of the biceps brachii muscle?

Abduction of the arm at the shoulder

Adduction of the arm at the shoulder

Extension of the forearm at the elbow

Flexion of the forearm at the elbow

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Verified step by step guidance

Understand the anatomy of the biceps brachii muscle: The biceps brachii is a two-headed muscle located in the upper arm. It originates from the scapula and inserts into the radius bone of the forearm. Its primary function is related to movements of the forearm and elbow joint.

Identify the types of movements possible at the elbow joint: The elbow joint allows for flexion (bending the forearm toward the upper arm) and extension (straightening the forearm away from the upper arm). The biceps brachii is primarily involved in flexion.

Analyze the role of the biceps brachii in flexion: When the biceps brachii contracts, it pulls on the radius bone, causing the forearm to move closer to the upper arm, which is the action of flexion.

Eliminate incorrect options: Abduction and adduction refer to movements at the shoulder joint, not the elbow. Extension of the forearm is performed by the triceps brachii, not the biceps brachii.

Conclude that the primary action of the biceps brachii muscle is flexion of the forearm at the elbow, as this is its main function during contraction.