ATI RN
Questions for Skeletal System Questions
Question 1 of 5
Which bones protect your heart, lungs, and liver?
Correct Answer: C
Rationale: The ribs, part of the thoracic cage in the axial skeleton, form a protective enclosure around vital organs. The 12 pairs of ribs, along with the sternum and thoracic vertebrae, shield the heart and lungs directly. The liver, located below the diaphragm, is partially protected by the lower ribs. Vertebrae protect the spinal cord, the skull protects the brain, and the femur is a leg bone, making 'ribs' the correct answer.
Question 2 of 5
The epiphyses are covered with to provide protection.
Correct Answer: A
Rationale: The epiphyses of long bones are covered with articular (hyaline) cartilage at joints, reducing friction and protecting bone ends during movement. Red and yellow marrow are inside bones, and the endosteum lines the medullary cavity, making 'articular (hyaline) cartilage' correct.
Question 3 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 4 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 5 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.