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 of the following best describes the primary action of the flexor carpi ulnaris muscle?

Extension and abduction of the wrist

Extension and adduction of the wrist

Flexion and abduction of the wrist

Flexion and adduction of the wrist

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Verified step by step guidance

Step 1: Begin by identifying the anatomical location and function of the flexor carpi ulnaris muscle. This muscle is located on the anterior (front) side of the forearm and is part of the flexor group of muscles.

Step 2: Understand the primary action of flexor muscles. Flexor muscles generally decrease the angle between two bones at a joint, which in this case involves flexion of the wrist.

Step 3: Recognize the secondary action of the flexor carpi ulnaris muscle. This muscle also contributes to adduction of the wrist, which means moving the wrist toward the midline of the body.

Step 4: Eliminate incorrect options based on the muscle's actions. For example, extension is performed by extensor muscles, not flexor muscles, so options involving extension can be ruled out.

Step 5: Combine the two primary actions of the flexor carpi ulnaris muscle—flexion and adduction of the wrist—to confirm the correct answer.