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

Classification of Joints

Anatomy & Physiology

8. Joints

Classification of Joints

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Problem 21

Textbook Question

The hip is an extremely stable joint because it has
(a) A complete bony socket
(b) A strong joint capsule
(c) Supporting ligaments
(d) All of these

Verified step by step guidance

Step 1: Begin by understanding the anatomy of the hip joint. The hip joint is a ball-and-socket joint formed by the articulation of the head of the femur (ball) and the acetabulum of the pelvis (socket). This structure provides stability and mobility.

Step 2: Analyze the role of the bony socket (acetabulum). The acetabulum is a deep, complete socket that securely holds the femoral head, contributing to the stability of the hip joint.

Step 3: Examine the joint capsule. The hip joint capsule is a strong fibrous structure that surrounds the joint, providing additional support and stability while allowing movement.

Step 4: Consider the supporting ligaments. Ligaments such as the iliofemoral, pubofemoral, and ischiofemoral ligaments reinforce the joint capsule and prevent excessive movement, further stabilizing the hip joint.

Step 5: Conclude by recognizing that all of these factors—bony socket, strong joint capsule, and supporting ligaments—work together to make the hip an extremely stable joint. Therefore, the correct answer is 'all of these.'

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Key Concepts

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

Bony Socket

The hip joint features a deep bony socket known as the acetabulum, which provides a secure fit for the femoral head. This anatomical structure enhances stability by allowing the femur to articulate firmly within the socket, reducing the likelihood of dislocation during movement.

Joint Capsule

The joint capsule of the hip is a robust, fibrous structure that encases the joint, providing both stability and protection. It is lined with synovial membrane, which produces synovial fluid to lubricate the joint, facilitating smooth movement while maintaining structural integrity.

Supporting Ligaments

Supporting ligaments, such as the iliofemoral, pubofemoral, and ischiofemoral ligaments, play a crucial role in stabilizing the hip joint. These ligaments connect the femur to the pelvis, limiting excessive movement and providing additional support during activities like walking, running, and jumping.

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Related Practice

Textbook Question

Match the types of joints to the descriptions that apply to them.

a. Fibrous joints

b. Cartilaginous joints

c. Synovial joints

9. Shoulder, hip, knee, and elbow joints

Textbook Question

Compare the amount of movement possible in synarthrotic, amphiarthrotic, and diarthrotic joints. Relate these terms to the structural classification of joints—that is, to fibrous, cartilaginous, and synovial joints.

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Textbook Question

Subacromial, subcoracoid, and subscapular bursae reduce friction in the____joint.

(a) hip

(b) knee

(d) shoulder

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Textbook Question

Although the knee joint is only one joint, it resembles____ separate joints.

(a) two

(b) three

(d) five