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

What is the primary action of the flexor carpi ulnaris muscle?

Pronation of the forearm

Flexion of the elbow

Extension and abduction of the wrist

Flexion and adduction of the wrist

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Verified step by step guidance

Step 1: Understand the location and attachment points of the flexor carpi ulnaris muscle. It originates from the medial epicondyle of the humerus and the olecranon of the ulna, and inserts into the pisiform, hamate, and base of the fifth metacarpal bone.

Step 2: Recall the primary function of the flexor carpi ulnaris muscle. Muscles that cross the wrist joint anteriorly typically contribute to flexion, while muscles that attach medially (on the ulnar side) contribute to adduction.

Step 3: Analyze the movement produced by the flexor carpi ulnaris. Since it crosses the wrist joint anteriorly and attaches medially, it facilitates flexion and adduction of the wrist.

Step 4: Eliminate incorrect options based on the muscle's anatomy and function. For example, pronation of the forearm involves muscles like the pronator teres, not the flexor carpi ulnaris. Similarly, extension and abduction of the wrist are actions of muscles like the extensor carpi radialis.

Step 5: Confirm the correct answer by matching the muscle's anatomical function with the provided options. The flexor carpi ulnaris is responsible for flexion and adduction of the wrist.