ATI RN
Questions About the Skeletal System Questions
Question 1 of 5
The cranium consists of a ... and a ..., the latter of which is divided into three cranial fossae anterior, middle and posterior.
Correct Answer: B
Rationale: The cranium has a vault (the upper, domed portion) and a base (the lower portion), with the base divided into anterior, middle, and posterior cranial fossae supporting the brain. 'Vault/base' correctly orders these anatomical regions.
Question 2 of 5
Which term refers to the first seven pairs of ribs that attach directly to the sternum via costal cartilage?
Correct Answer: B
Rationale: The first seven pairs of ribs are 'true ribs,' attaching directly to the sternum via costal cartilage, forming the rib cage’s core. 'Actual' and 'real' are not anatomical terms in this context.
Question 3 of 5
In the forearm, the ulna and the radius are connected all the way down by the ... membrane, which is a flexible ligament.
Correct Answer: A
Rationale: The interosseous membrane, a flexible ligament, connects the ulna and radius along their lengths, stabilizing them and allowing pronation/supination. 'Intraosseous' implies within a bone, not between.
Question 4 of 5
The femur has a small pit in its head - what's its name?
Correct Answer: C
Rationale: The fovea capitis is a small pit in the femoral head where the ligamentum teres attaches, anchoring it in the acetabulum. Other options are different femoral features (e.g., trochanters are projections).
Question 5 of 5
What are the two main divisions of the skeletal system?
Correct Answer: A
Rationale: The skeletal system is divided into the axial skeleton (skull, vertebral column, thoracic cage; 80 bones) and the appendicular skeleton (limbs, girdles; 126 bones), totaling 206 bones in adults. B refers to bone shapes, C to bone tissue types, and D to joint/connective tissue types—none are the main divisions.