Which suture extends from the anterior fontanel to the anterolateral fontanel?

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: D

Rationale: The cribriform plate, perforated for olfactory nerves, is part of the ethmoid bone. Sphenoid, maxilla, temporal, and vomer lack this structure.

Correct Answer: A

Rationale: Lordosis is an exaggerated inward curvature of the lower spine (lumbar region). Scoliosis is lateral deviation, kyphosis is outward curvature (hunchback), and spina bifida is a congenital defect, not a curvature.

Correct Answer: D

Rationale: The nasal septum is composed of hyaline cartilage, a smooth, resilient type that provides support and shape. Elastic cartilage (e.g., ear) is flexible, fibrous cartilage (e.g., intervertebral discs) is tough, and calcified cartilage is hardened—none match the nasal septum’s properties or repair needs as well as hyaline.

Correct Answer: D

Rationale: The axial skeleton includes the skull (22 bones), vertebral column (26 bones), ribs (24 bones), and sternum (1 bone), totaling 80 bones. The appendicular skeleton has 126 bones, making 90 and 126 incorrect, and 60 too low for the axial components.