ATI RN
Multiple Choice Questions Skeletal System Questions
Question 1 of 5
The purpose of the rib cage is to...
Correct Answer: C
Rationale: The rib cage (ribs, sternum, thoracic vertebrae) primarily protects the heart and lungs in the thoracic cavity. Stomach is abdominal, spinal cord is within vertebrae, and lungs attach via pleura—not the rib cage’s purpose. 'Protect the heart and lungs' is correct.
Question 2 of 5
Which type of cartilage is the precursor to endochondral bone?
Correct Answer: B
Rationale: Endochondral ossification, the process forming most bones, begins with a hyaline cartilage model that is gradually replaced by bone. Costal cartilage connects ribs to the sternum, fibroelastic isn’t a standard cartilage type (likely meant fibrocartilage), and articular cartilage covers joint surfaces, not serving as a precursor.
Question 3 of 5
Which portion of the temporal bone has a mandibular fossa?
Correct Answer: A
Rationale: The mandibular fossa, where the mandible articulates, is in the squamous portion of the temporal bone. The petrous portion houses ear structures, the tympanic portion surrounds the ear canal, and ‘articular portion’ isn’t a standard term here.
Question 4 of 5
Remodeling of bone is a function of
Correct Answer: A
Rationale: Bone remodeling involves osteoclasts (resorb bone) and osteoblasts (form bone), maintaining structure and calcium balance. Osteocytes maintain bone, chondrocytes form cartilage, and chondroblasts aren’t primary in bone remodeling.
Question 5 of 5
When Joe Student holds out his hand to receive money from his father, the movement may be described as
Correct Answer: B
Rationale: Holding out a hand palm-up involves extending the forearm (straightening) and supinating (rotating palm upward). Flexion bends the arm, pronation turns the palm down, abduction moves away from midline, and rejection/depression aren’t standard terms here.