Which of the following is an amphiarthrotic joint?

Correct Answer: A

Rationale: The symphysis pubis (cartilaginous) is slightly movable (amphiarthrotic). Sutures are immovable, elbow/shoulder are synovial (freely movable). Answer is A, per the document.

Correct Answer: C

Rationale: An osteon is a cylindrical unit of compact bone with concentric lamellae around a Haversian canal, not spongy bone, membrane, or bone end. Answer is C, 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).