Muscular System MCQs

  1. Which type of muscle tissue is characterized by voluntary control and striations?
    a) Smooth muscle
    b) Cardiac muscle
    c) Skeletal muscle
    d) Epithelial muscleAnswer: c) Skeletal muscle
  2. What is the functional unit of contraction in a muscle fiber called?
    a) Myofibril
    b) Sarcomere
    c) Myocyte
    d) Muscle fascicleAnswer: b) Sarcomere
  3. Which protein in muscle cells is primarily responsible for muscle contraction?
    a) Collagen
    b) Myosin
    c) Elastin
    d) ActinAnswer: b) Myosin
  4. What is the role of calcium ions in muscle contraction?
    a) They provide energy for contraction
    b) They bind to troponin to expose binding sites on actin
    c) They trigger the release of ATP
    d) They create the cross-bridge between actin and myosinAnswer: b) They bind to troponin to expose binding sites on actin
  5. Which type of muscle tissue is found in the walls of internal organs and is not under voluntary control?
    a) Skeletal muscle
    b) Cardiac muscle
    c) Smooth muscle
    d) Striated muscleAnswer: c) Smooth muscle
  6. Which muscle group is primarily responsible for the movement of the arm away from the body?
    a) Flexors
    b) Extensors
    c) Abductors
    d) AdductorsAnswer: c) Abductors
  7. Which structure in the muscle fiber stores and releases calcium ions during contraction?
    a) Sarcoplasmic reticulum
    b) Mitochondria
    c) Nucleus
    d) Golgi apparatusAnswer: a) Sarcoplasmic reticulum
  8. What is the term for the increase in muscle size that results from strength training?
    a) Muscle atrophy
    b) Muscle hypertrophy
    c) Muscle hyperplasia
    d) Muscle dystrophyAnswer: b) Muscle hypertrophy
  9. Which type of muscle contraction occurs when the muscle lengthens while maintaining tension?
    a) Concentric contraction
    b) Eccentric contraction
    c) Isometric contraction
    d) Isotonic contractionAnswer: b) Eccentric contraction
  10. Which muscle is known as the “prime mover” in a specific movement?
    a) Synergist
    b) Antagonist
    c) Fixator
    d) AgonistAnswer: d) Agonist
  11. What is the name of the connective tissue that surrounds and separates individual muscle fibers?
    a) Endomysium
    b) Perimysium
    c) Epimysium
    d) FasciaAnswer: a) Endomysium
  12. Which muscle is commonly known as the “six-pack” and is involved in flexing the vertebral column?
    a) Rectus abdominis
    b) External oblique
    c) Internal oblique
    d) Transversus abdominisAnswer: a) Rectus abdominis
  13. Which neurotransmitter is released from motor neurons to stimulate muscle contraction?
    a) Dopamine
    b) Norepinephrine
    c) Acetylcholine
    d) SerotoninAnswer: c) Acetylcholine
  14. Which muscle group is responsible for the flexion of the knee joint?
    a) Quadriceps
    b) Hamstrings
    c) Gluteals
    d) AdductorsAnswer: b) Hamstrings
  15. What is the name of the muscle located on the front of the thigh that is responsible for extending the knee?
    a) Biceps femoris
    b) Vastus lateralis
    c) Sartorius
    d) Rectus femorisAnswer: d) Rectus femoris

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