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 muscles is primarily responsible for flexing the anterior wrist and hand?

Extensor carpi ulnaris

Triceps brachii

Brachioradialis

Flexor carpi radialis

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Verified step by step guidance

Step 1: Understand the function of flexion in the anterior wrist and hand. Flexion refers to the movement that decreases the angle between the bones of the joint, bringing the palm closer to the forearm.

Step 2: Review the anatomy of the muscles listed in the options. The Extensor carpi ulnaris is responsible for wrist extension and ulnar deviation, not flexion. The Triceps brachii is involved in elbow extension, and the Brachioradialis assists in forearm flexion but does not flex the wrist.

Step 3: Focus on the Flexor carpi radialis. This muscle is located on the anterior side of the forearm and is primarily responsible for flexing the wrist and aiding in radial deviation (movement toward the thumb side).

Step 4: Relate the muscle's name to its function. 'Flexor' indicates its role in flexion, 'carpi' refers to the wrist, and 'radialis' points to its position near the radius bone.

Step 5: Conclude that the Flexor carpi radialis is the correct muscle responsible for flexing the anterior wrist and hand, based on its anatomical location and function.