ATI RN
Multiple Choice Questions Skeletal System Questions
Question 1 of 5
Which portion of the temporal bone has a mandibular fossa?
Correct Answer: A
Rationale: The mandibular fossa, where the mandible articulates, is in the squamous portion of the temporal bone. The petrous portion houses ear structures, the tympanic portion surrounds the ear canal, and ‘articular portion’ isn’t a standard term here.
Question 2 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 3 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 4 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.
Question 5 of 5
The Appendicular skeleton is comprised of bones.
Correct Answer: A
Rationale: The appendicular skeleton includes the pectoral girdles (4 bones), upper limbs (60 bones), pelvic girdle (2 bones), and lower limbs (60 bones), totaling 126 bones. The axial skeleton has 80 bones, making 100 and 110 incorrect estimates.