ATI RN
Multiple Choice Questions on Skeletal System Questions
Question 1 of 5
Bones that have a length approximately equal to the width is classified as a(n) bone.
Correct Answer: D
Rationale: Short bones, like carpals and tarsals, have roughly equal length and width, providing stability and support. Flat bones are thin and broad, irregular bones have complex shapes, and long bones are longer than wide, making 'short' the correct classification.
Question 2 of 5
Yellow bone marrow consists mostly of:
Correct Answer: B
Rationale: Yellow bone marrow, found in the medullary cavity of adult long bones, is primarily fat tissue (adipose), serving as an energy reserve. Cartilage is at joints, and red/white blood cells are in red marrow, making 'fat tissue' correct.
Question 3 of 5
Place the following steps of endochondral ossification in chronological order. 1) Formation of bone collar. 2) Formation of primary center of ossification. 3) Formation of secondary center of ossification. 4) Ossification of epiphyseal plate.
Correct Answer: A
Rationale: Endochondral ossification follows: 1) bone collar forms around the cartilage model, 2) primary ossification center forms in the diaphysis, 3) secondary centers form in the epiphyses, 4) epiphyseal plate ossifies, closing growth. Thus, '1-2-3-4' is the correct order.
Question 4 of 5
The membranous regions in between the cranial bones of a fetal skull are called:
Correct Answer: A
Rationale: Fontanels are soft, membranous gaps between fetal cranial bones, allowing skull flexibility during birth and growth (e.g., anterior fontanel). Foramina are holes, sinuses are cavities, and sutures are adult joints, making 'fontanels' correct.
Question 5 of 5
The cheek bones are predominately formed by the bones.
Correct Answer: D
Rationale: The zygomatic bones form the cheeks and lateral orbit rims, contributing to facial structure. The maxillae form the upper jaw, parietal the skull top, and temporal the sides, making 'zygomatic' correct.