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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3:13 minutes

Problem 8

Textbook Question

The structures that limit the range of motion of a joint and provide mechanical support across or around the joint are
(a) Bursae
(b) Tendons
(c) Menisci
(d) All of these

Verified step by step guidance

Step 1: Understand the function of each structure mentioned in the options. Bursae are fluid-filled sacs that reduce friction between moving parts, such as tendons and bones, but they do not directly limit the range of motion or provide mechanical support.

Step 2: Examine the role of tendons. Tendons connect muscles to bones and help stabilize joints by transmitting forces during movement, which can limit the range of motion and provide mechanical support.

Step 3: Analyze the function of menisci. Menisci are cartilage structures found in certain joints, such as the knee, that act as shock absorbers and help distribute weight across the joint. They also contribute to joint stability and limit excessive motion.

Step 4: Consider whether all of these structures (bursae, tendons, and menisci) collectively contribute to limiting the range of motion and providing mechanical support. Evaluate if the combination of their functions aligns with the question.

Step 5: Review the anatomical and physiological roles of each structure to determine if the correct answer is one specific structure or 'all of these,' based on their combined contributions to joint stability and motion limitation.

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Key Concepts

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

Bursae

Bursae are small, fluid-filled sacs located near joints that reduce friction between moving structures, such as bones and tendons. They act as cushions, allowing for smooth movement and preventing wear and tear on the joint surfaces. Understanding their role is essential for recognizing how they contribute to joint stability and function.

Tendons

Tendons are strong, fibrous connective tissues that attach muscles to bones. They play a crucial role in transmitting the force generated by muscles to facilitate movement at joints. Their structural integrity is vital for maintaining joint stability and ensuring proper motion during physical activities.

Menisci

Menisci are crescent-shaped cartilage structures found in certain joints, such as the knee. They serve to absorb shock, distribute weight, and enhance joint stability by deepening the joint surface. Their presence is critical for maintaining the health and functionality of the joint, especially during dynamic movements.