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 6

Textbook Question

The function of the articular cartilage is:
(a) To reduce friction
(b) To prevent bony surfaces from contacting one another
(c) To provide lubrication
(d) Both a and b

Verified step by step guidance

Understand the structure and location of articular cartilage: Articular cartilage is a smooth, white tissue that covers the ends of bones where they come together to form joints. It is a type of hyaline cartilage.

Review the primary functions of articular cartilage: Articular cartilage reduces friction between bones during movement and acts as a cushion to absorb shock, preventing direct contact between bony surfaces.

Analyze the options provided in the question: (a) reducing friction, (b) preventing bony surfaces from contacting one another, (c) providing lubrication, and (d) both a and b.

Evaluate each option based on the known functions of articular cartilage: Reducing friction (a) and preventing bony surfaces from contacting one another (b) are both correct descriptions of its function. Providing lubrication (c) is not a direct function of the cartilage itself but is facilitated by synovial fluid in the joint.

Conclude that the correct answer is (d) both a and b, as these accurately describe the primary functions of articular cartilage.

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Key Concepts

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

Articular Cartilage

Articular cartilage is a smooth, white tissue that covers the ends of bones in joints. Its primary function is to facilitate smooth movement between bones, reducing friction during joint motion. This cartilage is crucial for maintaining joint health and function, as it absorbs shock and distributes loads across the joint surface.

Friction Reduction

Reducing friction is essential in joint mechanics, as excessive friction can lead to wear and tear on the cartilage and underlying bone. Articular cartilage achieves this by providing a slick surface that allows bones to glide over each other smoothly, minimizing resistance during movement and preventing damage to the joint.

Joint Lubrication

Joint lubrication is vital for maintaining the health of articular cartilage and overall joint function. Synovial fluid, produced by the synovial membrane, works in conjunction with articular cartilage to provide lubrication, further reducing friction and allowing for easier movement. This lubrication also nourishes the cartilage, as it lacks a direct blood supply.

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