Q1. Which structural component of skeletal muscle stores calcium ions required for contraction?A. SarcolemmaB. Sarcoplasmic reticulumC. MyofibrilsD. T-tubules
Q2. Which of the following structures is responsible for transmitting nerve impulses to muscle fibers?A. SarcolemmaB. Neuromuscular junctionC. Sarcoplasmic reticulumD. Synovial membrane
Q3. Which of the following movements is an example of adduction?A. Lifting the arm sidewaysB. Bringing the arm towards the bodyC. Bending the kneeD. Rotating the wrist
Q4. Which structural protein is responsible for the elasticity of muscle fibers?A. MyosinB. TitinC. ActinD. Collagen
Q5. Which condition is characterized by age-related degeneration of joint cartilage?A. OsteoarthritisB. Rheumatoid arthritisC. GoutD. Myasthenia gravis
Q6. Which statement about muscles is incorrect?A. Cardiac muscles are involuntary.B. Skeletal muscles are striated and voluntary.C. Visceral muscles are voluntary in nature.D. Smooth muscles are found in the walls of internal organs.
Q7. Which muscle fiber type is correctly matched to its function?A. Red muscle fibers - Fast movementsB. White muscle fibers - High myoglobin contentC. Red muscle fibers - Slow and sustained activityD. White muscle fibers - Aerobic respiration
Q8. Which of the following conditions is caused by low calcium levels leading to muscle spasms?A. OsteoporosisB. TetanyC. GoutD. Arthritis
Q9. Which muscle is responsible for flexing the forearm at the elbow joint?A. Triceps brachiiB. Biceps brachiiC. DeltoidD. Pectoralis major
Q10. Which hormone plays a role in bone resorption by stimulating osteoclast activity?A. CalcitoninB. Parathyroid hormone (PTH)C. ThyroxineD. Insulin