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

8. Joints

Joint Movements

Anatomy & Physiology

8. Joints

Joint Movements

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Problem 12d

Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.
The shoulder joint is stabilized by the medial and lateral menisci.

Verified step by step guidance

Understand the anatomy of the shoulder joint: The shoulder joint, also known as the glenohumeral joint, is a ball-and-socket joint formed by the articulation of the humerus and the scapula. It is stabilized by muscles, tendons, and ligaments, not menisci.

Learn about the menisci: The medial and lateral menisci are crescent-shaped cartilage structures found in the knee joint, not the shoulder joint. They help stabilize the knee and absorb shock during movement.

Evaluate the statement: The statement claims that the shoulder joint is stabilized by the medial and lateral menisci. Since menisci are specific to the knee joint, this statement is false.

Correct the false statement: To make the statement true, it should be corrected to say, 'The shoulder joint is stabilized by muscles, tendons, and ligaments, such as the rotator cuff muscles and the glenohumeral ligaments.'

Review the corrected statement: Ensure the corrected statement accurately reflects the anatomy and physiology of the shoulder joint and its stabilization mechanisms.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Shoulder Joint Anatomy

The shoulder joint, also known as the glenohumeral joint, is a ball-and-socket joint that connects the humerus to the scapula. It is characterized by a high degree of mobility, allowing for a wide range of arm movements. Key structures involved in its stability include the rotator cuff muscles, ligaments, and the labrum, rather than menisci, which are specific to the knee joint.

Menisci Function

Menisci are C-shaped cartilaginous structures located in the knee joint that serve to absorb shock, stabilize the joint, and distribute weight. They play a crucial role in the knee's biomechanics but are not present in the shoulder joint. Understanding the specific functions of menisci helps clarify the differences between joint structures in the body.

Joint Stability Mechanisms

Joint stability is maintained through a combination of anatomical structures, including ligaments, tendons, and muscles. In the shoulder, the rotator cuff muscles and glenoid labrum are vital for providing stability during movement. Recognizing these mechanisms is essential for understanding how different joints are supported and protected during physical activity.