Which of the following bones is NOT part of the axial skeleton?
Sacrum.
Hyoid.
Ribs.
Scapula.
The Correct Answer is D
The scapula is a flat bone that forms part of the shoulder girdle and belongs to the appendicular skeleton.
The appendicular skeleton consists of the bones of the limbs and the girdles that attach them to the axial skeleton.
Choice A is incorrect because sacrum is a triangular bone that forms the posterior part of the pelvic girdle and belongs to the axial skeleton.
The axial skeleton consists of the bones of the head and trunk of a vertebrate.
Choice B is incorrect because hyoid is a U-shaped bone that lies in the anterior neck and belongs to the axial skeleton.
The hyoid bone supports the tongue and provides attachment for some muscles of swallowing and speech.
Choice C is incorrect because ribs are long curved bones that form the rib cage and belong to the axial skeleton.
The ribs protect the thoracic organs and assist in breathing.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["linea aspera"]
Explanation
The linea aspera is a ridge of bone on the posterior surface of the femur.
It is a prominent feature that serves as a site of attachment for several important muscles, including the adductor magnus, vastus medialis, and the long head of the biceps femoris.
The linea aspera extends from the greater trochanter of the femur to the lateral condyle of the femur, dividing the posterior surface of the bone into two distinct regions.
The medial lip of the linea aspera serves as an attachment site for the adductor magnus, while the lateral lip provides attachment for the vastus medialis and the long head of the biceps femoris.
Injuries to the linea aspera can occur as a result of direct trauma or repetitive stress and can cause pain and discomfort in the thigh.
Correct Answer is B
Explanation
The radius is a part of the upper limb, which is supported by the pectoral girdle.
The pectoral girdle and the pelvic girdle, along with the bones of the limbs, form the appendicular skeleton.
Choice A is incorrect because the mandible is a part of the skull, which forms the axial skeleton.
Choice C is incorrect because the sternum is a part of the thorax, which forms the axial skeleton.
Choice D is incorrect because the sacrum is a part of the vertebral column, which forms the axial skeleton.
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