What is a 'foramen'?

Correct Answer: C

Rationale: A foramen is a hole in a bone (e.g., foramen magnum) for nerves/vessels, not a depression, roughening, or projection. Answer is C, per the document.

Correct Answer: B

Rationale: Muscles move bones by pulling via tendons when they contract; they can’t push (bones provide push via leverage). Automatic isn’t a mechanism, making 'pull movement only' correct.

Correct Answer: B

Rationale: Endochondral ossification, the process forming most bones, begins with a hyaline cartilage model that is gradually replaced by bone. Costal cartilage connects ribs to the sternum, fibroelastic isn’t a standard cartilage type (likely meant fibrocartilage), and articular cartilage covers joint surfaces, not serving as a precursor.

Correct Answer: A

Rationale: The mandibular fossa, where the mandible articulates, is in the squamous portion of the temporal bone. The petrous portion houses ear structures, the tympanic portion surrounds the ear canal, and ‘articular portion’ isn’t a standard term here.

Correct Answer: A

Rationale: Bone remodeling involves osteoclasts (resorb bone) and osteoblasts (form bone), maintaining structure and calcium balance. Osteocytes maintain bone, chondrocytes form cartilage, and chondroblasts aren’t primary in bone remodeling.