ATI RN
Questions About Skeletal System with Answers Questions
Question 1 of 5
Which of the following is NOT part of a long bone?
Correct Answer: D
Rationale: A long bone includes the diaphysis (shaft), epiphysis (ends), and medullary cavity (marrow space). The perichondrium is a cartilage membrane, not part of mature long bones (which have a periosteum instead), making 'perichondrium' the correct answer for what is NOT included.
Question 2 of 5
Bone-forming cells are called:
Correct Answer: B
Rationale: Osteoblasts are cells that synthesize bone matrix, forming new bone tissue. Osteoprogenitor cells are precursors, osteocytes maintain bone, and osteoclasts resorb it, making 'osteoblasts' the correct answer.
Question 3 of 5
Which type of fracture occurs when the break is ragged due to twisting of the bone?
Correct Answer: D
Rationale: A spiral fracture results from twisting forces, creating a ragged, helical break (e.g., in sports injuries). Compressed fractures shorten bones, comminuted fractures shatter them, and impacted fractures involve ends driven together, making 'spiral' correct.
Question 4 of 5
The cranial bone(s) that forms the forehead, a portion of the nose and the superior portion of the orbits is/are the bone(s).
Correct Answer: B
Rationale: The frontal bone forms the forehead, part of the nasal cavity roof, and the superior orbit rims. The ethmoid is internal, parietal forms the sides, and sphenoid is deeper, making 'frontal' the correct answer.
Question 5 of 5
The lower jaw is formed by the:
Correct Answer: A
Rationale: The mandible, the only movable skull bone, forms the lower jaw and holds lower teeth. The maxillae are upper jaw, vomer is nasal, and zygomatic is cheek, making 'mandible' correct.