Chpt. 10 & 11 Multiple Choice II Created By Day

40 Questions | Total Attempts: 49

SettingsSettingsSettings
Please wait...
Muscle Quizzes & Trivia

Questions and Answers
  • 1. 
    Which muscle type depends solely on the sarcoplasmic reticulum as its calcium source?
    • A. 

      Skeletal muscle

    • B. 

      Smooth muscle

    • C. 

      Cardiac muscle

    • D. 

      Skeletal and smooth muscle

    • E. 

      Smooth and cardiac muscle

  • 2. 
    Which muscle(s) can contract without the need for nervous stimulation?
    • A. 

      Skeletal muscle

    • B. 

      Smooth muscle

    • C. 

      Cardiac muscle

    • D. 

      Smooth and cardiac muscle

    • E. 

      Skeletal, smooth and cardiac muscle

  • 3. 
    80% of the lactic acid produced by skeletal muscle is converted to pyruvic acid  
    • A. 

      By the kidneys

    • B. 

      In the liver

    • C. 

      In the muscle tissue

    • D. 

      In the sarcoplasmic reticulum

    • E. 

      In the neuromuscular junction

  • 4. 
    During muscle contraction, a single myosin head consumes ATP at a rate of about  
    • A. 

      1 ATP per second.

    • B. 

      3 ATP per second.

    • C. 

      5 ATP per second.

    • D. 

      7 ATP per second.

    • E. 

      9 ATP per second.

  • 5. 
    The term for shortening of a muscle while maintaining constant tension is
    • A. 

      Treppe.

    • B. 

      Tetanus.

    • C. 

      Isokinetic contraction.

    • D. 

      Isometric contraction.

    • E. 

      Isotonic contraction.

  • 6. 
    Which fibers are primarily responsible for producing lactic acid?
    • A. 

      Type I slow oxidative fibers

    • B. 

      Type IIA intermediate glycolytic fibers

    • C. 

      Type IIB fast glycolytic fibers

    • D. 

      Type I slow-twitch fibers

    • E. 

      Red fibers

  • 7. 
    In comparison to skeletal muscle, smooth muscle
    • A. 

      Contracts more slowly but relaxes more rapidly.

    • B. 

      Contracts more rapidly but relaxes more slowly.

    • C. 

      Contracts and relaxes more slowly.

    • D. 

      Consumes more ATP to maintain a given level of muscle tension.

    • E. 

      Depends on a nerve fiber to supply the calcium needed for contraction.

  • 8. 
    Which of the following is very important for muscle to continue contraction during anaerobic respiration?
    • A. 

      Cholinesterase inhibitors

    • B. 

      Protease

    • C. 

      Myokinase

    • D. 

      Acetylcholinesterase

    • E. 

      Acid phosphatase

  • 9. 
    The minimum stimulus needed to cause muscle contraction is called
    • A. 

      The threshold.

    • B. 

      The latent period.

    • C. 

      Twitch.

    • D. 

      Recruitment.

    • E. 

      Innervation.

  • 10. 
    If one nerve stimulus arrives at a muscle fiber so soon that the fiber has only partially relaxed from the previous twitch, the most likely result will be 
    • A. 

      Fatigue.

    • B. 

      Treppe.

    • C. 

      Incomplete tetanus.

    • D. 

      Complete tetanus.

    • E. 

      Flaccid paralysis.

  • 11. 
    Which of the following is true concerning isotonic eccentric contraction? 
    • A. 

      The muscle shortens but tension remains constant.

    • B. 

      The muscle lengthens but tension remains constant.

    • C. 

      The muscle tenses and shortens.

    • D. 

      The muscle tenses but length remains unchanged.

    • E. 

      The muscle lengthens and tension declines.

  • 12. 
    Which of the following has the largest mitochondria? 
    • A. 

      Slow oxidative fibers

    • B. 

      Fast glycolytic fibers

    • C. 

      Cardiac muscle

    • D. 

      Smooth muscle

    • E. 

      Intermediate fibers

  • 13. 
    Which statement best describes the goal of medications used to treat myasthenia gravis?  
    • A. 

      To increase the number of acetylcholine receptors

    • B. 

      To decrease the number of synaptic vesicles

    • C. 

      To promote multiple motor unit summation

    • D. 

      To inhibit Ca2+ release from the sarcoplasmic reticulum

    • E. 

      To inhibit the function of cholinesterase

  • 14. 
    The process of bringing more motor units into use during a muscle contraction is called
    • A. 

      Wave summation.

    • B. 

      Recruitment.

    • C. 

      Treppe.

    • D. 

      Incomplete tetanus.

    • E. 

      Complete tetanus.

  • 15. 
    Aerobic respiration produces approximately _____ more ATPs per glucose molecule than glycolysis does.
    • A. 

      12

    • B. 

      24

    • C. 

      36

    • D. 

      48

    • E. 

      100

  • 16. 
    Athletes who train at high altitudes increase their red blood cell count and thus increase their oxygen supply during exercise. Increased oxygen supply results in  
    • A. 

      Increased glycolysis.

    • B. 

      Increased use of myokinase.

    • C. 

      Longer aerobic respiration.

    • D. 

      Longer anaerobic fermentation.

    • E. 

      Reduced ATP consumption.

  • 17. 
    Cardiac muscle has very little capacity for regeneration because it lacks  
    • A. 

      Satellite cells.

    • B. 

      Endomysium.

    • C. 

      Sarcomeres.

    • D. 

      Dense bodies.

    • E. 

      Somatic nerve fibers.

  • 18. 
    Which of the following would be caused by contraction of smooth muscle?
    • A. 

      Goose bumps

    • B. 

      Blood leaving the left ventricle of the heart

    • C. 

      Elevating the eyebrows

    • D. 

      Blinking the eyelids

    • E. 

      Deep inspiration

  • 19. 
    Exposure to Clostridium tetani causes continuous release of acetylcholine. What effect does this have on smooth muscle?
    • A. 

      Flaccid paralysis

    • B. 

      Option 2

    • C. 

      Spastic paralysis

    • D. 

      Lockjaw

    • E. 

      No effect

    • F. 

      Myocardial atrophy

  • 20. 
    Dystrophin, the protein that is defective in muscular dystrophy, is normally found  
    • A. 

      Between the outermost myofilaments and the sarcolemma of a muscle fiber.

    • B. 

      As a transmembrane protein of the sarcolemma.

    • C. 

      In the Z discs of skeletal and cardiac muscle.

    • D. 

      In the dense bodies of smooth muscle.

    • E. 

      Bridging the gap between the sarcolemma and synaptic knob.

  • 21. 
    Creatine kinase
    • A. 

      Donates one of its phosphate groups to ADP.

    • B. 

      Phosphorylates and activates certain enzymes in the sarcoplasm.

    • C. 

      Acts as a second messenger in muscle fibers.

    • D. 

      Catalyzes the transfer of phosphate from CP to ADP.

    • E. 

      Functions as a substitute for ATP during anaerobic fermentation.

  • 22. 
    Release of acetylcholine at a neuromuscular junction
    • A. 

      Decreases the release of Ca2+ from the sarcoplasmic reticulum.

    • B. 

      Increases permeability of the sarcolemma to Na+.

    • C. 

      Decreases the positive charge on the sarcolemma.

    • D. 

      Lowers the threshold of the muscle fiber.

    • E. 

      Overrides the inhibitory effect of acetylcholinesterase.

  • 23. 
    Loss of muscle mass from lack of activity is termed  
    • A. 

      Myopathy.

    • B. 

      Dystrophy.

    • C. 

      Apathy.

    • D. 

      Atrophy.

    • E. 

      Treppe.

  • 24. 
    Which of the following is not a characteristic of a muscle cell?  
    • A. 

      Plasticity

    • B. 

      Contractility

    • C. 

      Conductivity

    • D. 

      Extensibility

    • E. 

      Excitability

  • 25. 
    Collagen is  
    • A. 

      Contractile.

    • B. 

      Excitable.

    • C. 

      Elastic.

    • D. 

      Expendable.

    • E. 

      Impermeable.

Back to Top Back to top