1. Which structure is not part of the central nervous system? A. Brain B. Spinal Cord C. Sciatic Nerve D. Brainstem Correct Answer: C. Sciatic Nerve Rationale: The sciatic nerve is part of the peripheral nervous system, which connects the central nervous system to the limbs and organs. 2. What type of bone is the femur? A. Long Bone B. Short Bone C. Flat Bone D. Irregular Bone Correct Answer: A. Long Bone Rationale: The femur is classified as a long bone due to its elongated shape and the role it plays in supporting the weight of the body. 3. Which muscle is primarily responsible for the flexion of the elbow joint? A. Biceps Brachii B. Triceps Brachii