1. Which bone is commonly known as the collarbone? a) Scapula b) Clavicle c) Humerus d) Sternum Answer: b) Clavicle Rationale: The clavicle, or collarbone, connects the arm to the body, located above the first rib. 2. What is the primary function of the axial skeleton? a) To facilitate movement b) To protect internal organs c) To produce blood cells d) To store minerals Answer: b) To protect internal organs Rationale: The axial skeleton includes the skull, vertebral column, and rib cage, which primarily protect the brain, spinal cord, and thoracic organs. 3. Which cells are responsible for bone resorption? a) Osteoblasts b) Osteocytes c) Osteoclasts d) Chondrocytes Answer: c) Osteoclasts Rationale: Osteoclasts are specialized cells that break down bone tissue, a process essential for bone remodeling and calcium homeostasis. 4. What is the term for the growth plate in long bones? a) Epiphysis b) Diaphysis c) Metaphysis d) Periosteum Answer: c) Metaphysis Rationale: The metaphysis is the region of long bones that contains the growth plate, where bone growth occurs in length.