Questions and Answers
Define diarthrosis synovial.
Very movable joint with synovial fluid in between the bones.
What are the three different motions of diarthrosis synovial?
Uniaxial, biaxial, triaxial (multiaxial).
Define uniaxial joint.
Bone moves in just one plane or axis.
Define biaxial joint.
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All synovial joints are diarthroses.
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What are the four components of diarthrosis synovial joints?
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Define articular capsule.
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What is the function of articular capsules?
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What are articular capsules made of?
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Define joint cavity.
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What is the function of articular cartilage?
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What is articular cartilage made of?
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Where does synovial fluid come from?
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What are the functions of synovial fluid?
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What are the six types of synovial joints?
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Define plane joint.
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Plane joint: uniaxial, biaxial, or multiaxial?
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What are two examples of a plane joint?
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Define hinge joint.
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Hinge joint: uniaxial, biaxial, or multiaxial?
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What are two examples of hinge joints?
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Define pivot joint.
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Pivot joint: uniaxial, biaxial, or multiaxial?
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What are two examples of a pivot joint?
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Define condylar joint.
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Condylar joint: uniaxial, biaxial, or multiaxial?
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What is an example of a condylar joint?
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Define saddle joint.
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Saddle joint: uniaxial, biaxial, or multiaxial?
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What is an example of a saddle joint?
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Define ball-&-socket joint.
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Ball-&-socket joint: uniaxial, biaxial, or multiaxial?
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What are two examples of ball-&-socket joints?
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Study Notes
Synovial Joint Classification
- Diarthrosis synovial joints are highly mobile, characterized by the presence of synovial fluid between bones.
- They allow for diverse movement types: uniaxial, biaxial, and triaxial (multiaxial) motions.
- All synovial joints fall under the diarthrosis category, confirming their high mobility.
Joint Types and Movements
- Uniaxial Joints: Bones move in a single plane or axis. Examples include hinge and pivot joints.
- Biaxial Joints: Bones move in two planes or axes. Condylar and saddle joints fall into this category.
- Multiaxial Joints: Bones can move in multiple planes. The ball-and-socket joint is an example.
Components of Diarthrosis Synovial Joints
- Articular Capsule: A joint capsule that encases synovial joints, retaining synovial fluid within.
- Articular Cartilage: Smooth cartilage (hyaline) that covers bone surfaces to facilitate joint movement.
- Joint Cavity: A hollow space within a joint containing synovial fluid.
- Synovial Fluid: Secreted by the synovial membrane, it serves to lubricate joints, nourish chondrocytes, and absorb shocks.
Specific Joint Definitions
- Plane Joint: Features flat articular surfaces allowing gliding movements; classified as uniaxial; examples include intercarpal and intertarsal joints.
- Hinge Joint: One bone's convex surface fits into the concave depression of another; also uniaxial; typical examples are the elbow and knee.
- Pivot Joint: A joint allowing one bone to rotate around another; categorized as uniaxial; examples are the atlantoaxial joint and radioulnar joint.
- Condylar Joint: An oval shape fits into a respective depression; classified as biaxial; the metacarpophalangeal joint exemplifies this joint type.
- Saddle Joint: Articular surfaces that resemble a saddle; also biaxial; an example is the carpometacarpal joint of the thumb.
- Ball-and-Socket Joint: Characterized by a spherical head fitting into a cup-like socket; classified as multiaxial; examples include the shoulder and hip joints.
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Description
Test your knowledge on the classification of synovial joints and their movements. This quiz covers diarthrosis joints, types of movements such as uniaxial, biaxial, and multiaxial, as well as the components that make up synovial joints. Ideal for students studying anatomy or physiology.
