Physiology Quiz (Block 1.2)

59 multiple-choice questions with explanations for Physiology, Block 1.2: Integument and Musculoskeletal System. Free, works offline.

Questions

  1. The connective tissue layer surrounding each individual muscle fiber is the:
  2. A triad consists of:
  3. The smallest functional unit of skeletal muscle is the:
  4. During contraction, which band stays the same length?
  5. Which protein binds Ca²⁺ to start contraction in skeletal muscle?
  6. At rest, the myosin-binding sites on actin are covered by:
  7. Which protein is mainly responsible for passive tension when muscle is stretched?
  8. Which feature is characteristic of smooth muscle but not skeletal muscle?
  9. Which statement about skeletal muscle fibers is correct?
  10. At the neuromuscular junction, acetylcholine binds:
  11. In skeletal muscle, the DHP receptor opens the ryanodine receptor by:
  12. In the crossbridge cycle, binding of ATP to the myosin head causes:
  13. The power stroke is triggered by release of:
  14. Rigor mortis occurs because:
  15. Relaxation of skeletal muscle depends mainly on:
  16. According to the sliding filament theory, during contraction:
  17. During a 100 m sprint, ATP in the first 10–15 seconds comes mainly from:
  18. Anaerobic glycolysis yields how much ATP per glucose?
  19. Which activity relies mainly on the aerobic pathway?
  20. Muscle hypertrophy after resistance training is due mainly to:
  21. A muscle cramp is best relieved by:
  22. Maximal active tension is produced at a sarcomere length of about:
  23. As a muscle is stretched beyond its optimal length, passive tension:
  24. A motor unit is:
  25. Muscles used for fine movements, such as the extraocular muscles, have:
  26. According to the size principle, which motor units are recruited first?
  27. The latent period of a twitch corresponds to:
  28. Why can a second stimulus summate with the first twitch?
  29. Treppe is produced by repeated stimuli of the same intensity given:
  30. Stimuli that arrive before the muscle has fully relaxed produce:
  31. A wavy plateau with small valleys between stimuli is:
  32. Fused (complete) tetanus is characterized by:
  33. Which is NOT a proposed mechanism of peripheral fatigue?
  34. Muscle fatigue correlates most closely with depletion of:
  35. Holding a heavy bag still at your side is an example of:
  36. Lowering a cup slowly to the table uses the biceps in:
  37. In an isotonic contraction, a heavier load causes:
  38. A reflex is best defined as:
  39. A tendon reflex is NOT triggered by stroking the tendon because:
  40. In a reflex arc, the sensory neuron enters the spinal cord through the:
  41. The only truly monosynaptic reflexes in humans are the:
  42. An autonomic reflex differs from a somatic reflex in that its efferent pathway:
  43. Compared with an innate spinal reflex, a learned reflex usually has:
  44. The biceps reflex tests spinal segments:
  45. The triceps reflex is tested by tapping the tendon just above the:
  46. During the abdominal reflex, the umbilicus normally moves:
  47. The patellar reflex is elicited by tapping the patellar ligament and tests:
  48. The Achilles reflex tests which segment?
  49. Light shone into the right eye constricts the left pupil. This is the:
  50. If a tendon reflex seems absent, the examiner should first:
  51. Brisk reflexes with clonus and an extensor plantar response suggest a lesion of the:
  52. Frogs are used for the wet lab mainly because they are:
  53. Pithing the frog destroys the brain and spinal cord in order to:
  54. The nerve prepared with the frog gastrocnemius is the:
  55. The preparation is kept moist with:
  56. In PhysioEx, the electrical stimulus replaces:
  57. In PhysioEx Activity 1, as voltage increases above threshold, the latent period:
  58. Increasing voltage from 8.5 V to 10 V gives no increase in single-twitch force because:
  59. In PhysioEx Activity 6, shortening the muscle below its optimal length (75 mm):