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Question 1. Which type of bone is primarily responsible for producing blood cells in the adult human body? A) Compact bone B) Spongy (cancellous) bone C) Cartilage D) Periosteum Answer: B Explanation: Spongy bone, found mainly in the interior of bones like the vertebrae and epiphyses, contains red marrow responsible for hematopoiesis (blood cell production), whereas compact bone provides strength. Question 2. Which muscle fiber type is primarily involved in sustained, endurance activities? A) Type I (slow-twitch) B) Type IIa (fast oxidative) C) Type IIb (fast glycolytic) D) Type III (intermediate) Answer: A Explanation: Type I (slow-twitch) fibers are fatigue-resistant and are used for endurance activities such as long-distance running. Question 3. Which joint classification includes joints that permit movement in multiple planes, such as the shoulder joint? A) Fibrous joints B) Cartilaginous joints C) Synovial joints D) Synarthroses Answer: C Explanation: Synovial joints are freely movable joints with a fluid-filled cavity, allowing movement in multiple planes, as seen in the shoulder. Question 4. Which peripheral nerve supplies the anterior compartment of the thigh?
A) Sciatic nerve B) Femoral nerve C) Obturator nerve D) Pudendal nerve Answer: B Explanation: The femoral nerve supplies the iliacus, quadriceps, and other anterior thigh muscles, providing motor innervation to this compartment. Question 5. Which major artery supplies blood to the femoral head in a typical adult? A) Obturator artery B) Medial circumflex femoral artery C) Lateral circumflex femoral artery D) Deep femoral artery Answer: B Explanation: The medial circumflex femoral artery supplies most of the blood to the femoral head, especially important in femoral neck fractures. Question 6. Which structure connects muscle to bone? A) Ligament B) Tendon C) Cartilage D) Bursa Answer: B Explanation: Tendons connect muscle to bone and transmit forces during muscle contraction, facilitating movement. Question 7. Which type of bone healing involves direct remodeling without callus formation? A) Primary bone healing B) Secondary bone healing C) Fibrous union
Answer: B Explanation: MRI provides excellent visualization of soft tissues, including ligaments, tendons, and menisci, making it ideal for soft tissue injury assessment. Question 11. Which bone tumor is most commonly benign and presents as a cartilage-capped bony outgrowth? A) Osteosarcoma B) Enchondroma C) Osteochondroma D) Ewing's sarcoma Answer: C Answer: C Explanation: Osteochondroma is a benign bone tumor characterized by a cartilage-capped bony protrusion, often asymptomatic. Question 12. Which condition results from a deficiency of vitamin D leading to defective mineralization of bone in children? A) Osteoporosis B) Osteomalacia C) Paget's disease D) Rickets Answer: D Answer: D Explanation: Rickets is caused by vitamin D deficiency in children, leading to defective mineralization and bone deformities. Question 13. Which nerve entrapment syndrome is characterized by numbness and tingling in the distribution of the median nerve at the wrist? A) Cubital tunnel syndrome B) Carpal tunnel syndrome C) Guyon’s canal syndrome
D) Radial tunnel syndrome Answer: B Answer: B Explanation: Carpal tunnel syndrome involves median nerve compression at the wrist, causing sensory and motor symptoms in the hand. Question 14. Which muscle is primarily involved in shoulder abduction after the initial 15 degrees? A) Supraspinatus B) Deltoid C) Infraspinatus D) Subscapularis Answer: B Explanation: The deltoid muscle is responsible for shoulder abduction beyond 15 degrees, following initiation by the supraspinatus. Question 15. Which of the following is a characteristic feature of a Grade II ligament sprain? A) Mild stretching with microscopic tears B) Partial tear with moderate instability C) Complete rupture with significant instability D) Chronic laxity without pain Answer: B Answer: B Explanation: Grade II sprains involve partial tearing of ligament fibers, leading to moderate joint instability and pain. Question 16. Which type of fracture is classified as a Salter-Harris Type I fracture? A) Fracture through the growth plate only B) Fracture through the metaphysis C) Fracture through the epiphysis D) Fracture involving both metaphysis and epiphysis
C) Gout D) Septic arthritis Answer: B Answer: B Explanation: Rheumatoid arthritis typically involves symmetric joint swelling and morning stiffness lasting over an hour. Question 20. Which surgical procedure involves replacing the entire joint surface with a prosthesis? A) Arthroscopy B) Arthrodesis C) Arthroplasty D) Osteotomy Answer: C Answer: C Explanation: Arthroplasty refers to joint replacement surgery, such as total hip or knee replacement, involving prosthetic components. Question 21. Which bone in the forearm is more commonly fractured in a fall onto an outstretched hand? A) Radius B) Ulna C) Humerus D) Carpals Answer: A Answer: A Explanation: The distal radius is the most common fracture site in FOOSH (fall on outstretched hand) injuries. Question 22. Which ligament stabilizes the anterior aspect of the knee and is commonly injured in sports?
A) Posterior cruciate ligament (PCL) B) Anterior cruciate ligament (ACL) C) Medial collateral ligament (MCL) D) Lateral collateral ligament (LCL) Answer: B Answer: B Explanation: The ACL stabilizes anterior tibial translation; it is frequently torn during sports involving pivoting. Question 23. Which condition involves the abnormal lateral curvature of the spine in adolescence? A) Scoliosis B) Kyphosis C) Lordosis D) Spondylolysis Answer: A Answer: A Explanation: Scoliosis is characterized by a lateral curvature of the spine, often diagnosed during adolescence. Question 24. Which of the following is the primary imaging modality for detecting disc herniation in the lumbar spine? A) X-ray B) MRI C) CT scan D) Bone scan Answer: B Answer: B Explanation: MRI provides detailed images of soft tissues, making it ideal for identifying disc herniations.
Question 28. Which condition is characterized by inflammation of the bursa located over the greater trochanter? A) Trochanteric bursitis B) Olecranon bursitis C) Prepatellar bursitis D) Ischial bursitis Answer: A Answer: A Explanation: Trochanteric bursitis involves inflammation of the bursa over the greater trochanter, causing lateral hip pain. Question 29. Which classification system is used for grading osteoporotic fractures? A) Gardner classification B) Salter-Harris classification C) AO/OTA classification D) Garden classification Answer: C Answer: C Explanation: The AO/OTA classification system is used to categorize fractures, including osteoporotic fractures. Question 30. Which blood test is most useful in diagnosing gout? A) Rheumatoid factor B) Uric acid level C) Erythrocyte sedimentation rate D) ANA Answer: B Answer: B
Explanation: Elevated uric acid levels are associated with gout, although levels can be normal during acute attacks. Question 31. Which type of fracture involves a break through the growth plate and metaphysis, common in adolescents? A) Salter-Harris Type I B) Salter-Harris Type II C) Salter-Harris Type III D) Salter-Harris Type IV Answer: B Answer: B Explanation: Type II fractures involve the growth plate and metaphysis, often seen in adolescents. Question 32. Which ligament is most commonly injured in ankle sprains? A) Anterior talofibular ligament B) Calcaneofibular ligament C) Deltoid ligament D) Posterior talofibular ligament Answer: A Answer: A Explanation: The anterior talofibular ligament is most frequently torn in inversion ankle sprains. Question 33. Which condition presents with a painless, slow-growing soft tissue mass often diagnosed as a lipoma? A) Liposarcoma B) Fibroma C) Lipoma D) Sarcoma Answer: C Answer: C
Answer: B Explanation: The lateral cutaneous nerve of the forearm, a branch of the radial nerve, supplies this region. Question 37. Which phase of bone healing is characterized by the formation of a soft callus? A) Inflammatory phase B) Reparative phase C) Remodeling phase D) Fibrous union Answer: B Answer: B Explanation: During the reparative phase, soft callus forms and is replaced by woven bone. Question 38. Which muscle is primarily involved in shoulder abduction initiated by the supraspinatus? A) Deltoid B) Trapezius C) Infraspinatus D) Subscapularis Answer: A Answer: A Explanation: The deltoid muscle is responsible for shoulder abduction after the initial movement initiated by supraspinatus. Question 39. Which laboratory test is most useful in diagnosing rheumatoid arthritis? A) Uric acid B) Rheumatoid factor C) CBC D) ESR Answer: B
Answer: B Explanation: Rheumatoid factor is an antibody often present in RA and aids in diagnosis. Question 40. Which surgical procedure is performed to fuse two or more vertebrae to stabilize the spine? A) Laminectomy B) Spinal fusion C) Discectomy D) Arthroplasty Answer: B Answer: B Explanation: Spinal fusion involves fusing vertebrae to stabilize the spine, often for degenerative or traumatic conditions. Question 41. Which type of joint movement is demonstrated by rotating the forearm so the palm faces downward? A) Pronation B) Supination C) Flexion D) Extension Answer: A Answer: A Explanation: Pronation refers to rotating the forearm so the palm faces downward. Question 42. Which bone is most commonly fractured in a fall onto an outstretched hand (FOOSH)? A) Humerus B) Radius C) Ulna D) Clavicle Answer: B
Answer: B Explanation: Osteomalacia, often due to vitamin D deficiency, results in defective mineralization of bone matrix. Question 46. Which nerve is most at risk during anterior dislocation of the shoulder? A) Axillary nerve B) Musculocutaneous nerve C) Radial nerve D) Suprascapular nerve Answer: A Answer: A Explanation: The axillary nerve is vulnerable during anterior shoulder dislocations, risking deltoid paralysis. Question 47. Which condition involves abnormal stretching and increased elasticity of connective tissue, leading to joint hypermobility? A) Marfan syndrome B) Ehlers-Danlos syndrome C) Osteogenesis imperfecta D) Rheumatoid arthritis Answer: B Answer: B Explanation: Ehlers-Danlos syndrome causes defective collagen synthesis, leading to hyperflexible joints. Question 48. Which ligament is most commonly injured in a lateral ankle sprain? A) Anterior talofibular ligament B) Calcaneofibular ligament C) Deltoid ligament D) Posterior talofibular ligament Answer: A
Answer: A Explanation: The anterior talofibular ligament is most frequently torn in inversion injuries causing lateral ankle sprains. Question 49. Which condition is characterized by a painless, enlarging, soft tissue mass in soft tissues, often a benign tumor? A) Lipoma B) Fibrosarcoma C) Malignant fibrous histiocytoma D) Liposarcoma Answer: A Answer: A Explanation: Lipomas are benign, soft, painless fatty tumors commonly found in subcutaneous tissues. Question 50. Which imaging modality is most sensitive for detecting early osteomyelitis? A) X-ray B) MRI C) Bone scan D) CT scan Answer: B Answer: B Explanation: MRI is highly sensitive for early detection of osteomyelitis, showing marrow edema before radiographic changes. Question 51. Which condition is characterized by a "bamboo spine" appearance on radiographs? A) Rheumatoid arthritis B) Ankylosing spondylitis C) Psoriatic arthritis D) Osteoarthritis Answer: B
Answer: C Answer: C Explanation: The remodeling phase replaces woven bone with organized lamellar bone, restoring original strength. Question 55. Which muscle is primarily involved in shoulder internal rotation? A) Supraspinatus B) Infraspinatus C) Subscapularis D) Teres minor Answer: C Answer: C Explanation: The subscapularis is the main muscle responsible for internal rotation of the shoulder. Question 56. Which laboratory test is most useful for diagnosing pseudogout? A) Uric acid B) Calcium pyrophosphate crystal analysis in synovial fluid C) Rheumatoid factor D) ESR Answer: B Answer: B Explanation: Pseudogout involves calcium pyrophosphate crystals in joint fluid, diagnosed via polarized microscopy. Question 57. Which surgical approach is most commonly used for total hip replacement? A) Posterior approach B) Anterior approach C) Lateral approach D) Medial approach
Answer: A Answer: A Explanation: The posterior approach is the most common surgical route for total hip arthroplasty. Question 58. Which bone injury is characterized by a "hip pointer" involving contusion of the iliac crest? A) Pelvic fracture B) Iliac wing contusion C) Avulsion fracture D) Sacral fracture Answer: B Answer: B Explanation: A "hip pointer" is a contusion of the iliac crest, often from direct trauma. Question 59. Which type of graft is most commonly used in spinal fusion surgeries? A) Autograft B) Allograft C) Xenograft D) Synthetic graft Answer: A Answer: A Explanation: Autografts, typically from the iliac crest, are preferred due to better integration and healing. Question 60. Which condition involves a non-inflammatory, degenerative narrowing of the spinal canal, often causing neurogenic claudication? A) Herniated disc B) Spinal stenosis C) Spondylolisthesis D) Scoliosis
