Which one of the following bones is located in the upper leg?

Correct Answer: A

Rationale: The upper leg (thigh) contains the femur, the longest bone, from hip to knee. The fibula and tibia are lower leg bones, and the radius is in the forearm, making 'Femur' the correct answer.

Correct Answer: C

Rationale: Extension is straightening a joint, increasing the angle (e.g., extending the arm). A is rotation, B is adduction, and D is flexion, making 'Straightening limbs at a joint' the best description.

Correct Answer: A

Rationale: A trochanter is a bony projection on the femur—greater (lateral) and lesser (medial)—for muscle attachment, not articulation or a groove. It’s specific to the femur, not pelvis. Answer is A, per the document.

Correct Answer: C

Rationale: The mandible’s temporomandibular joint (with the temporal bone) is synovial, allowing chewing/speaking. Sphenoid, maxilla, and hyoid lack synovial joints (sutures or none). Answer is C, per the document.

Correct Answer: B

Rationale: Appendicular skeleton includes limbs/girdles: clavicle, fibula, metatarsal, phalange, radius are all appendicular. Ethmoid, coccyx, occipital, sternum, mandible are axial. Answer is B, per the document.