Which type of synovial joint is characterized by two flat bone surfaces sliding over each other?
Hinge joint
Plane joint
Ball-and-socket joint
Saddle joint
The Correct Answer is B
A. Hinge joint: A hinge joint allows movement in one plane (flexion/extension) like the elbow, not sliding between flat surfaces.
B. Plane joint: Plane (gliding) joints have relatively flat articular surfaces that permit sliding or gliding motions between bones.
C. Ball-and-socket joint: Ball-and-socket joints (shoulder, hip) permit multiaxial movement with a rounded head fitting into a socket rather than flat-surface sliding.
D. Saddle joint: Saddle joints have complementary concave/convex surfaces that allow biaxial movement (e.g., thumb carpometacarpal), not simple flat gliding.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. A cavity within a bone:A cavity within a bone (for example the medullary cavity) is not the definition of a joint.
B. A point where two bones fuse permanently:A permanent fusion of bones is called a synostosis and is not the general definition of a joint.
C. A site where two or more bones meet:A joint (articulation) is the site where two or more bones meet and permit varying degrees of movement.
D. The connection between muscle and bone:The connection between muscle and bone is a tendon, not a joint.
Correct Answer is B
Explanation
A. Medullary cavity:The medullary cavity is the hollow central space within the diaphysis that contains bone marrow; it is not where bone lengthening takes place.
B. Epiphyseal plate:The epiphyseal plate (growth plate) is the area of hyaline cartilage between the diaphysis and epiphysis where new bone is produced, leading to longitudinal bone growth during development.
C. Periosteum:The periosteum is a dense connective tissue layer covering the outer surface of bones and contributes to bone thickness and repair rather than length.
D. Articular cartilage:Articular cartilage covers the ends of bones in joints to provide a smooth surface for movement but is not involved in bone growth.
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