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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
The transverse foramen is a hole in each transverse process of the cervical vertebrae that allows the passage of the vertebral artery, vein, and nerve.
It is a distinctive feature of the cervical vertebrae and is not found on any other type.
Choice B is incorrect because lamina is a part of the vertebral arch that connects the transverse process to the spinous process.
It is present on all types of vertebrae.
Choice C is incorrect because pedicle is a part of the vertebral arch that connects the vertebral body to the transverse process.
It is present on all types of vertebrae.
Choice D is incorrect because spinous process is a bony projection on the posterior aspect of the vertebral arch that serves as an attachment site for muscles and ligaments.
It is present on all types of vertebrae.
Correct Answer is ["Ischial tuberosity"]
Explanation
The ischial tuberosity is a bony prominence located at the base of the pelvis.
It is the part of the pelvis that bears weight when sitting and is commonly referred to as the "sitting bone." The ischial tuberosity is attached to several important muscles, including the hamstrings and the adductor magnus, which play a crucial role in hip extension and thigh adduction, respectively.
The ischial tuberosity is also an important landmark for identifying the sciatic nerve, which runs in close proximity to the bone.
Injuries to the ischial tuberosity can occur as a result of prolonged sitting, direct trauma, or repetitive stress, and can cause pain and discomfort in the buttocks and hips.
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