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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3:25 minutes

Problem 14

Textbook Question

Examples of monaxial joints, which permit angular movement in a single plane, are
(a) The intercarpal and intertarsal joints
(b) The shoulder and hip joints
(c) The elbow and knee joints
(d) All of these

Verified step by step guidance

Understand the concept of monaxial joints: Monaxial joints are synovial joints that allow movement in only one plane, such as flexion and extension.

Review the types of synovial joints: Synovial joints are classified based on the axes of movement they permit—monaxial (one plane), biaxial (two planes), and triaxial (three planes).

Analyze the examples provided: Intercarpal and intertarsal joints (option a) are gliding joints, which allow limited movement in multiple planes, not strictly monaxial. Shoulder and hip joints (option b) are ball-and-socket joints, which are triaxial, allowing movement in three planes. Elbow and knee joints (option c) are hinge joints, which are monaxial, permitting movement in a single plane.

Evaluate the final option (option d): 'All of these' implies that all the listed joints are monaxial, but based on the analysis, only the elbow and knee joints fit the definition of monaxial joints.

Conclude the reasoning: The correct answer is the option that specifically identifies monaxial joints, which are the elbow and knee joints (option c).

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Key Concepts

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

Monaxial Joints

Monaxial joints, also known as uniaxial joints, allow movement around a single axis, enabling angular motion in one plane. Examples include hinge joints, like the elbow, which permit flexion and extension, and pivot joints, which allow rotation. Understanding the structure and function of these joints is crucial for identifying their examples.

Types of Joints

Joints are classified based on their structure and the type of movement they allow. The main types include synovial, fibrous, and cartilaginous joints. Synovial joints, which include monaxial joints, are characterized by a fluid-filled joint cavity that facilitates smooth movement, making them essential for various physical activities.

Examples of Joint Movements

Different joints allow for various types of movements, such as flexion, extension, abduction, and rotation. Recognizing the specific movements permitted by each joint type helps in identifying examples of monaxial joints. For instance, the elbow allows for flexion and extension, while the shoulder permits a wider range of motion, illustrating the differences between joint types.