Hemopoiesis would most likely take place in the

Correct Answer: B

Rationale: Hemopoiesis (blood cell production) occurs in red bone marrow, abundant in spongy bone of vertebrae, ribs, and pelvis in adults. The hyoid lacks marrow, maxilla has limited marrow, and scapula has some but less than vertebrae, which are a primary site.

Correct Answer: B

Rationale: The coracoid process, a projection on the scapula, aids shoulder stability. A fracture there involves the scapula, not the clavicle, ulna, or ribs.

Correct Answer: D

Rationale: The pituitary gland sits in the sella turcica, a depression in the sphenoid bone. Surgery (e.g., transsphenoidal) targets this area, not the mastoid, pterygoid, or styloid processes.

Correct Answer: A

Rationale: The pinna (external ear) in mammals is supported by elastic cartilage, which provides flexibility and resilience to maintain its shape. Hyaline cartilage is rigid (e.g., nose), white fibrous tissue is dense (e.g., tendons), and calcified cartilage is hardened—elastic cartilage is uniquely suited for the pinna.

Correct Answer: B

Rationale: The femur (thigh bone) is the longest and strongest bone in the human body, supporting significant weight and muscle forces during movement. The cranium is a collection of bones, not a single bone, while the tibia and radius are shorter and less robust.