ATI RN
Questions for Skeletal System Questions
Question 1 of 5
Which of the following is NOT a function of the skeleton?
Correct Answer: B
Rationale: The skeleton protects soft organs (e.g., skull protects brain), supports the body (via structure), and stores minerals (calcium, phosphorus) and fat (yellow marrow). Vitamin D production occurs in the skin upon sunlight exposure, not the skeleton, though bones use vitamin D to absorb calcium. Thus, 'produces vitamin D' is NOT a skeletal function.
Question 2 of 5
Blood vessels travel from one central canal to another central canal through a:
Correct Answer: C
Rationale: Perforating canals (Volkmann’s canals) connect central canals (Haversian canals) in osteons, allowing blood vessels to travel between them. Canaliculi connect osteocytes, the medullary canal is the marrow cavity, and trabeculae are in spongy bone, making 'perforating canal' correct.
Question 3 of 5
The process of endochondral ossification uses a model of to form bones.
Correct Answer: B
Rationale: Endochondral ossification forms bones (e.g., long bones) from a hyaline cartilage model, which ossifies over time. Fibrocartilage is in joints, fibrous membranes are for intramembranous ossification, and adipose is fat, making 'hyaline cartilage' correct.
Question 4 of 5
Identify the four paranasal sinuses associated with the skull.
Correct Answer: D
Rationale: The paranasal sinuses are frontal (forehead), maxillary (cheek), sphenoidal (behind eyes), and ethmoidal (between eyes), all skull-related. Temporal and mastoid are not sinuses, mandibular is the jaw, making 'frontal, maxillary, sphenoidal and ethmoidal' correct.
Question 5 of 5
The hard palate is formed by the and bones.
Correct Answer: B
Rationale: The hard palate, the mouth’s roof, is formed by the maxillae (anterior) and palatine bones (posterior). The mandible is the lower jaw, zygomatic the cheek, and vomer the nasal septum, making 'maxillae: palatine' correct.