ATI RN
Questions About Skeletal System with Answers Questions
Question 1 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.
Question 2 of 5
Identify the bones that form the pectoral girdle.
Correct Answer: A
Rationale: The pectoral girdle, supporting the upper limbs, comprises the scapulae (shoulder blades) and clavicles (collarbones). Radii/ulnae are forearm, coxal bones are pelvic, and tibiae/fibulae are leg, making 'Scapulae and clavicles' correct.
Question 3 of 5
Identify the three regions of the coxal bones.
Correct Answer: D
Rationale: The coxal bone (hip) has three regions: ilium (upper), ischium (lower posterior), and pubis (lower anterior), fusing at the acetabulum. The sacrum is separate, making 'Ilium, ischium and pubis' correct.
Question 4 of 5
The pelvis is formed from the
Correct Answer: B
Rationale: The pelvis includes two coxal bones (hips), the sacrum, and coccyx, forming a ring supporting the lower body. Scapulae, clavicles, and sternum are pectoral, making 'coxal bones, sacrum, and coccyx' correct.
Question 5 of 5
Which of the following is NOT a cartilagenous joint?
Correct Answer: B
Rationale: Cartilaginous joints (e.g., vertebrae via discs, rib-sternum via costal cartilage, pubic symphysis) use cartilage. Tooth sockets (gomphosis) are fibrous joints, not cartilaginous, making 'between a tooth root and its socket' correct.