Questions and Answers
The amount of movement permitted by a particular joint is the basis for the functional classification of joints.
True
All joints permit some degree of movement, even if very slight.
False
Hinge joints permit movement in only two planes.
False
Synovial fluid is a viscous material that is derived by filtration from blood.
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The articular surfaces of synovial joints play a minimal role in joint stability.
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The major role of ligaments at synovial joints is to help direct movement and restrict undesirable movement.
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The only movement allowed between the first two cervical vertebrae is flexion.
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Movement at the hip joint does not have as wide a range of motion as at the shoulder joint.
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A person who has been diagnosed with a sprained ankle has an injury to the ligaments that attach to that joint.
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A movement of the forearm in which the palm of the hand is turned from posterior to anterior is supination.
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The wrist joint can exhibit adduction and eversion movements.
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Cruciate ligaments are important ligaments that stabilize all ball-and-socket joints.
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Flexion of the ankle so that the superior aspect of the foot approaches the shin is called dorsiflexion.
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The gripping of the trochlea by the trochlear notch constitutes the 'hinge' for the elbow joint.
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The ligamentum teres represents a very important stabilizing ligament for the hip joint.
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The structural classification of joints is based on the composition of the binding material and the presence or absence of a joint cavity.
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Synovial fluid contains phagocytic cells that protect the cavity from invasion by microbes or other debris.
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A person who has been diagnosed with rheumatoid arthritis would be suffering loss of the synovial fluids.
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A ball-and-socket joint is a multiaxial joint.
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Bending of the tip of the finger exhibits flexion.
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Dislocations in the TMJ almost always dislocate posteriorly with the mandibular condyles ending up in the infratemporal fossa.
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Symphyses are synarthrotic joints designed for strength with flexibility.
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A fibrous joint that is a peg-in-socket is called a ________ joint.
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The cruciate ligaments of the knee ________.
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Articular cartilage found at the ends of the long bones serves to ________.
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A joint united by dense fibrocartilaginous tissue that usually permits a slight degree of movement is a ________.
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On the basis of structural classification, which joint is fibrous connective tissue?
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Connective tissue sacs lined with synovial membranes that act as cushions in places where friction develops are called ________.
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Articulations permitting only slight degrees of movement are ________.
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________ are cartilaginous joints.
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The gliding motion of the wrist is accomplished because of the ________ joint.
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Study Notes
Joint Classification and Movements
- Functional classification of joints is based on permissible movement.
- Not all joints allow movement; some are immobile.
- Hinge joints permit movement in only one plane.
- Synovial fluid is filtered from blood, providing lubrication to joints.
- Articular surfaces contribute significantly to the stability of synovial joints.
- Ligaments in synovial joints help direct and restrict movements.
Joint Functionality
- The first two cervical vertebrae allow multiple movements beyond just flexion.
- The hip joint offers less range of motion compared to the shoulder joint.
- A sprained ankle indicates injury to the ligaments surrounding the joint.
Movement Terms
- Supination refers to turning the palm from a posterior to an anterior position.
- The wrist joint lacks adduction and eversion movements.
- Dorsiflexion is the upward bending of the foot towards the shin.
- The trochlear notch acts as a hinge for elbow movement.
Ligaments and Joint Stability
- Cruciate ligaments are critical for stabilizing the knee, preventing hyperextension.
- The ligamentum teres is not a major stabilizing ligament for the hip joint.
Joint Structure
- Structural classification is based on binding material and joint cavity presence.
- Synovial fluid contains protective phagocytic cells against microbes.
- Diagnosing rheumatoid arthritis does not correlate with loss of synovial fluids.
Types of Joints
- Ball-and-socket joints are classified as multiaxial.
- Flexion can be observed in finger movements.
- Dislocations in the temporomandibular joint (TMJ) do not typically move posteriorly.
Joint Types and Examples
- Gomphosis is a fibrous joint structure resembling a peg-in-socket.
- Symphyses are cartilaginous joints characterized by strength and flexibility.
- A joint connected by dense fibrocartilaginous tissue that allows slight movement is a symphysis.
- Syndesmosis is a type of fibrous connective tissue joint.
Bursae and Movement Degrees
- Bursae are synovial-filled sacs that cushion areas prone to friction.
- Amphiarthroses allow slight movement whereas synarthroses permit no movement.
- Synchondroses are an example of cartilaginous joints.
Joint Actions
- The gliding motion of the wrist is facilitated by plane joints.
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Description
Explore the functional classification of joints and understand the various movements they allow. This quiz covers key concepts such as hinge joints, synovial fluid, and the roles of ligaments in joint stability and movement. Test your knowledge on joint functionality and movement terms with this comprehensive assessment.
