What is the metaphysis?

Correct Answer: B

Rationale: The metaphysis is the region between the diaphysis (shaft) and epiphysis (end), part of the growth plate. Answer is B, per the document.

Correct Answer: B

Rationale: Cartilage is flexible and rubbery (e.g., ear), while bone is rigid and firm due to mineralization. Bone isn’t primitive (both are ancient), and both are internal, making 'Cartilage is rubbery, and bone is firm' correct.

Correct Answer: C

Rationale: The skeletal system has several key functions: producing blood cells (hematopoiesis) in the bone marrow, storing minerals like calcium and phosphorus, and protecting vital organs (e.g., skull protects the brain, rib cage protects the heart and lungs). However, storing carbohydrates is not a function of the skeletal system; carbohydrate storage primarily occurs in the liver and muscles as glycogen.

Correct Answer: C

Rationale: The vomer is a single, midline facial bone forming part of the nasal septum. Maxillae, lacrimals, and nasals are paired bones, while the vomer is unpaired, making it the correct choice.

Correct Answer: C

Rationale: Paranasal sinuses are air-filled cavities in the frontal, ethmoid, sphenoid, and maxilla bones, reducing skull weight and resonating sound. The vomer, a thin midline bone in the nasal septum, lacks a sinus.