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

1. Introduction to Anatomy & Physiology

Introduction to Anatomical Terms for Body Regions

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Anatomical Terms for Body Regions

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Multiple Choice

Which muscle is primarily responsible for rotating the scapula upward during arm elevation?

Latissimus dorsi

Biceps brachii

Pectoralis major

Serratus anterior

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Verified step by step guidance

Understand the anatomy of the scapula and its movement during arm elevation. The scapula rotates upward to allow the arm to elevate above the head, a motion critical for activities like reaching or throwing.

Identify the muscles involved in scapular movement. Key muscles include the serratus anterior, trapezius, rhomboids, and levator scapulae. Among these, the serratus anterior plays a significant role in upward rotation.

Learn the function of the serratus anterior. This muscle originates from the upper ribs and inserts on the medial border of the scapula. Its contraction pulls the scapula forward and upward, facilitating upward rotation during arm elevation.

Compare the functions of the other muscles listed in the problem. The latissimus dorsi primarily extends, adducts, and medially rotates the arm; the biceps brachii flexes the elbow and supinates the forearm; and the pectoralis major adducts and medially rotates the arm. None of these muscles are primarily responsible for upward rotation of the scapula.

Conclude that the serratus anterior is the correct answer because it is the primary muscle responsible for upward rotation of the scapula during arm elevation, working in coordination with the trapezius muscle.