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Chapter 9: Problem 20

The joint between adjacent vertebrae that includes an invertebral disc is classified as which type of joint? a. diarthrosis b. multiaxial c. amphiarthrosis d. synarthrosis

Short Answer

Expert verified
The joint is classified as an amphiarthrosis.

Step by step solution

01

Identify the Characteristics of Each Joint Type

To solve this problem, we need to understand the characteristics of each type of joint mentioned in the options. Diarthrosis joints are highly movable, typically found in synovial joints. Multiaxial refers to a type of movement in diarthrotic joints that allows for movement around multiple axes. Amphiarthrosis joints allow for slight movement and are characterized by cartilaginous connections. Synarthrosis joints are immovable and are primarily found in fibrous connections.
02

Analyze the Intervertebral Disc

An intervertebral disc is a cartilaginous pad found between the vertebrae in the spinal column. These discs provide cushioning and allow for some movement and flexibility in the spine, which means they are not highly movable but offer slight movement.
03

Match Joint Type to Characteristics

Given that intervertebral discs allow for slight movement, they match the characteristics of an amphiarthrosis joint. Amphiarthrosis joints are categorized by their cartilaginous connections and limited mobility, both of which apply to the intervertebral disc joint.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Vertebral Joints
Our spine is made up of multiple vertebral joints, connecting individual vertebrae, and providing structural integrity as well as flexibility to the spine. These joints are essential for movement and stability. Vertebral joints are classified based on their structure and the type of movement they allow.
  • Facets and Cartilage: These joints include small facet joints, which are synovial in nature and aid in the varied range of motion in the spine.
  • Role and Importance: Vertebral joints support movements such as bending, twisting, and flexing while safeguarding the spinal cord.
In particular, vertebral joints enhance our body's flexibility without sacrificing strength. It is crucial for maintaining proper posture and performing everyday activities with ease.
Intervertebral Disc
Intervertebral discs play a critical role in the spinal joints, positioned between each vertebra. These are pads made of cartilage that allow movements such as bending and twisting, giving the spine its flexibility.
Intervertebral discs serve several key functions:
  • Shock Absorption: They act as cushions, absorbing the impact and stress exerted on the spine during activities like walking or jumping.
  • Mobility and Flexibility: The presence of these discs enables a slight range of motion at each joint, contributing to the overall flexibility of the spine.
  • Nutrient Exchange: As cartilage does not have a blood supply, these discs undergo a continuous process of compression and relaxation to facilitate nutrient and waste exchange.
Overall, intervertebral discs are vital for ensuring healthy spinal function, protecting against damage, and allowing us to move with ease.
Amphiarthrosis Joint
The term "amphiarthrosis joint" refers to a type of joint that allows only slight movement and is characterized by its cartilaginous connections. These joints are more flexible than immovable synarthrosis joints but offer less motion than diarthrosis joints.
Key features of amphiarthrosis joints include:
  • Limited Mobility: These joints allow for minimal movement, which is essential for stability combined with slight movement.
  • Cartilaginous Structure: They are typically connected by cartilage, providing a firm yet flexible link between bones.
  • Examples: The intervertebral discs within the spine are prime examples of amphiarthrosis joints, facilitating limited motion and acting as shock absorbers.
In essence, amphiarthrosis joints are essential for maintaining the balance between mobility and stability in the body, enabling critical structural support without compromising the range of movements entirely.

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Most popular questions from this chapter

Which region of the vertebral column has the greatest range of motion for rotation? a. cervical b. thoracic C. lumbar d. sacral

The primary support for the glenohumeral joint is provided by the ________. a. coracohumeral ligament b. glenoid labrum c. rotator cuff muscles d. subacromial bursa

Synovial joints ________. a. are derived from fontanelles b. are produced by intramembranous ossification c. develop at an interzone site d. are produced by endochondral ossification

Which statement is true concerning the knee joint? a. The lateral meniscus is an intrinsic ligament located on the lateral side of the knee joint. b. Hyperextension is resisted by the posterior cruciate ligament. C. The anterior cruciate ligament supports the knee when it is flexed and weight bearing. d. The medial meniscus is attached to the tibial collateral ligament.

Watch this video (http://openstaxcollege.org/I/ synjoints) to see an animation of synovial joints in action. Synovial joints are places where bones articulate with each other inside of a joint cavity. The different types of synovial joints are the ball-and-socket joint (shoulder joint), hinge joint (knee), pivot joint (atlantoaxial joint, between C1 and C2 vertebrae of the neck), condyloid joint (radiocarpal joint of the wrist), saddle joint (first carpometacarpal joint, between the trapezium carpal bone and the first metacarpal bone, at the base of the thumb), and plane joint (facet joints of vertebral column, between superior and inferior articular processes). Which type of synovial joint allows for the widest ranges of motion?
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