ATI RN
Multiple Choice Questions Skeletal System Questions
Question 1 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 2 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 3 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.
Question 4 of 5
The formation of erythrocytes in foetus takes place in
Correct Answer: C
Rationale: In a fetus, erythropoiesis (erythrocyte formation) primarily occurs in the liver and spleen during early development, before red bone marrow takes over after birth. Sarcoplasm is muscle cell cytoplasm, and blood is where erythrocytes reside, not where they form, making the liver and spleen the correct fetal sites.
Question 5 of 5
How many bones does the adult human body have?
Correct Answer: B
Rationale: The adult human skeleton typically consists of 206 bones. This number accounts for the fusion of certain bones (e.g., sacrum, coccyx) that occurs after infancy, when the count is higher (around 270). 210 is close but slightly over, while 180 and 126 are significantly under the standard count.