Which bone forms the posterior portion of the hard palate?
Palatine bone
Vomer
Mandible
Sphenoid
The Correct Answer is A
A. Palatine bone: The palatine bones form the posterior part of the hard palate and contribute to the floor of the nasal cavity.
B. Vomer: The vomer forms part of the nasal septum, not the hard palate.
C. Mandible: The mandible is the lower jaw and does not form any part of the hard palate.
D. Sphenoid: The sphenoid bone contributes to the skull base but is not the primary bone forming the posterior hard palate.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Irregular bone:Irregular bones have complex shapes (for example vertebrae) and do not describe the long, cylindrical femur.
B. Short bone:Short bones are roughly cube-shaped (for example carpals) and do not apply to the femur.
C. Long bone:Long bones are elongated with a shaft and two ends, which describes the femur as the prototypical long bone.
D. Flat bone:Flat bones are thin and plate-like (for example the sternum and skull bones) and are not the shape of the femur.
Correct Answer is D
Explanation
A. Chondrocytes:Chondrocytes maintain cartilage and are not the principal cells responsible for bone resorption in osteoporosis.
B. Fibroblasts:Fibroblasts synthesize connective tissue matrix and are not the main drivers of bone density loss.
C. Osteoblasts:Osteoblasts form new bone, and reduced rather than increased osteoblastic activity contributes to osteoporosis when bone formation lags behind resorption.
D. Osteoclasts:Osteoclasts resorb bone matrix, and increased osteoclastic activity relative to formation leads to net bone loss seen in osteoporosis.
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