The gliding motion of the carpal bones uses _____ joints.
Hinge
Plane
Ball-and-socket
Condyloid
Pivot
The Correct Answer is B
Choice A reason: Hinge joints allow movement in one plane, such as flexion and extension, seen in the elbow and knee. They do not permit gliding motions.
Choice B reason: Plane joints are the correct answer. They allow bones to slide past each other in any direction along the plane of the joint. The carpal bones in the wrist articulate via plane joints, enabling gliding movements.
Choice C reason: Ball-and-socket joints allow multi-directional movement and rotation, such as in the shoulder and hip. They are not involved in the gliding motion of carpal bones.
Choice D reason: Condyloid joints permit movement in two planes, such as flexion/extension and abduction/adduction. They are found in the wrist but not between carpal bones.
Choice E reason: Pivot joints allow rotational movement around a single axis, such as the joint between the atlas and axis vertebrae. They do not facilitate gliding.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A reason: Both the zygomatic and nasal bones are paired. Each side of the face has one zygomatic bone and one nasal bone, making them bilateral structures.
Choice B reason: The mandible is unpaired, but the maxilla is paired. Each side of the face has a maxillary bone, so this combination is not entirely correct.
Choice C reason: Mandible and vomer are the correct answer. Both are unpaired bones in the facial skeleton. The mandible forms the lower jaw, and the vomer forms part of the nasal septum. They are midline structures and exist as single bones.
Choice D reason: Both the lacrimal and maxilla are paired bones. Each orbit has a lacrimal bone, and each side of the face has a maxilla.
Choice E reason: The palatine bones are paired, while the vomer is unpaired. This combination is partially correct but not as accurate as choice C.
Correct Answer is E
Explanation
Choice A reason: Osteoclasts are large, multinucleated cells responsible for bone resorption. They do not arise from osteoblasts and are not involved in matrix secretion.
Choice B reason: Osteogenic cells are stem cells that differentiate into osteoblasts. They are precursors, not the result of matrix entrapment.
Choice C reason: Chondrocytes are cartilage cells, not bone cells. They originate from chondroblasts and are unrelated to osteoblast transformation.
Choice D reason: Osteoid refers to the unmineralized bone matrix secreted by osteoblasts. "Osteoid cell" is not a recognized term for a mature bone cell.
Choice E reason: Osteocyte is the correct answer. Once an osteoblast becomes encased in the bone matrix it secretes, it differentiates into an osteocyte. Osteocytes reside in lacunae and maintain bone tissue.
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