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

The prime movers of the glenohumeral joint are the ______.

biceps brachii and triceps brachii

latissimus dorsi and trapezius

deltoid and pectoralis major

supraspinatus and infraspinatus

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Verified step by step guidance

Understand the anatomy of the glenohumeral joint: The glenohumeral joint is the ball-and-socket joint of the shoulder, where the head of the humerus fits into the glenoid cavity of the scapula. It allows a wide range of motion, including flexion, extension, abduction, adduction, rotation, and circumduction.

Learn the concept of prime movers: Prime movers, also known as agonists, are the muscles primarily responsible for generating movement at a joint. They contract to produce the desired motion.

Identify the muscles involved in shoulder movement: The deltoid muscle is responsible for abduction, flexion, and extension of the shoulder, while the pectoralis major contributes to flexion, adduction, and internal rotation of the shoulder. These muscles are considered prime movers of the glenohumeral joint.

Differentiate other muscles listed in the options: The biceps brachii and triceps brachii are primarily involved in elbow movement, not the glenohumeral joint. The latissimus dorsi and trapezius are involved in movements of the back and scapula, while the supraspinatus and infraspinatus are part of the rotator cuff, stabilizing the shoulder joint rather than acting as prime movers.

Conclude that the correct answer is deltoid and pectoralis major, as these muscles are the primary movers responsible for the major actions of the glenohumeral joint.