Where is the xiphoid process?

Correct Answer: A

Rationale: The xiphoid process is the inferior tip of the sternum, not humerus, temporal (mastoid/styloid), or tibia. Answer is A, per the document.

Correct Answer: D

Rationale: Bones’ strength comes from calcium and phosphorus in hydroxyapatite, forming a hard matrix. Silica is minimal, cartilage is flexible, blood/marrow fill spaces—not strength sources. 'Calcium and phosphorous' is correct.

Correct Answer: B

Rationale: Tendons are fibrous tissues connecting muscles to bones, transmitting force for movement. Ligaments link bones, not muscles to ligaments or bone cells, making 'To link muscles to bones' correct.

Correct Answer: A

Rationale: The coronal suture runs transversely, separating the frontal bone from the parietal bones, and extends from the anterior fontanel (top center) toward the anterolateral fontanels (sides). The lambdoidal suture is posterior, squamosal is lateral, and longitudinal isn’t a standard cranial suture term (likely meant sagittal).

Correct Answer: C

Rationale: The superior and middle conchae (turbinates) are projections of the ethmoid bone in the nasal cavity, aiding air filtration. The inferior concha is separate, while palatine, nasal, and maxilla bones don’t form these structures.