What is the only bone in the body that does not articulate with another bone?
phalanges
hyoid
patella
occipital
The Correct Answer is B
Rationale:
A. Phalanges are the bones of the fingers and toes and articulate with adjacent bones in the hands and feet.
B. Hyoid is a U-shaped bone located in the anterior neck that does not directly articulate with any other bone. Instead, it is anchored by muscles and ligaments, providing support for the tongue and serving as an attachment point for muscles involved in swallowing and speech.
C. Patella is the kneecap and articulates with the femur, forming part of the knee joint.
D. Occipital is a cranial bone that articulates with the parietal and temporal bones and forms part of the skull base.
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Related Questions
Correct Answer is D
Explanation
Rationale:
A. Osteons are structural units of compact bone, not bone-resorbing cells.
B. Osteoblasts are bone-building cells that secrete the matrix and promote bone formation, not breakdown.
C. Osteocytes are mature bone cells derived from osteoblasts. They maintain bone tissue but do not actively break it down.
D. Osteoclasts are large, multinucleated cells responsible for bone resorption. They secrete enzymes and acids that dissolve the bone matrix, playing a vital role in bone remodeling, calcium homeostasis, and repair.
Correct Answer is {"dropdown-group-1":"C"}
Explanation
Rationale:
A. C2 refers to the axis, the second cervical vertebra, which allows rotation of the head.
B. T1 is the first thoracic vertebra, located in the upper back, not the cervical region.
C. The atlas is the first cervical vertebra and supports the skull, allowing nodding movements of the head (as in “yes”). It articulates with the occipital condyles of the skull and works in conjunction with the axis (C2) to facilitate head rotation.
D. L5 refers to the fifth lumbar vertebra, located in the lower back, not the cervical region.
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