What are most cranial bones like?

Correct Answer: A

Rationale: Most cranial bones (e.g., frontal, parietal, occipital) are flat, providing a broad, protective shield for the brain. Irregular bones (e.g., sphenoid, ethmoid) exist in the skull, but flat bones predominate in the cranium.

Correct Answer: B

Rationale: The vertebral arch, posterior to the body, consists of two pedicles (attaching to the body) and two laminae (flat plates forming the arch’s roof). Processes (e.g., spinous, transverse) project from the arch but are not its core components.

Correct Answer: B

Rationale: The scapula (shoulder blade) is triangular, with a broad base superiorly and an apex inferiorly, optimizing muscle attachment and shoulder mobility. It’s neither rectangular nor square.

Correct Answer: A

Rationale: The thumb (digit 1) has two phalanges (proximal and distal), unlike the other fingers (digits 2–5), which have three (proximal, middle, distal), due to its unique structure for opposition.

Correct Answer: B

Rationale: Metatarsals are numbered 1 to 5, from the hallux (big toe) to the pinky toe, matching the five digits of the foot and their phalanges.