Muscular Practice Exam Part 3 - A & P Zoo 172 For Exam 1

98 Questions | Total Attempts: 146

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AP Quizzes & Trivia

This is a practice exam for the first Exam in Zoology 172 A & P for Nursing School at Miami University. This covers the muscular system.


Questions and Answers
  • 1. 
    __________ are fibrous tendonous sheets that anchor certain muscles.
    • A. 

      Tendons

    • B. 

      Ligaments

    • C. 

      Aponeuroses

    • D. 

      Fascia

  • 2. 
    The CT sheath around a whole muscle is called the ____________.
    • A. 

      Epimysium

    • B. 

      Perimysium

    • C. 

      Endomysium

    • D. 

      Fascicle

  • 3. 
    The CT that covers the fascicle of a muscle is the ___________.
    • A. 

      Epimysium

    • B. 

      Perimysium

    • C. 

      Endomysium

    • D. 

      Myofibril

  • 4. 
    The CT that covers the individual muscle fibers is the _______________.
    • A. 

      Epimysium

    • B. 

      Perimysium

    • C. 

      Endomysium

    • D. 

      Myofibril

  • 5. 
    The part of the muscles levels that are NOT covered in CT are the ___________.
    • A. 

      Fascicles

    • B. 

      Muscles fibers

    • C. 

      Whole muscles

    • D. 

      Myofibrils

  • 6. 
    Skeletal muscle fibers are very large, single nucleated cells that change in size by increasing or decreasing their volume.
    • A. 

      True

    • B. 

      False

  • 7. 
    __________ are the filaments that provide the muscle with its contractile quality.
    • A. 

      Myosin

    • B. 

      Myofibrils

    • C. 

      Actin

    • D. 

      Sarcolemma

  • 8. 
    The ___________ is the membrane of the myofibril.
    • A. 

      Sarcomere

    • B. 

      Sarcolemma

    • C. 

      Sarcoplasmic reticulum

    • D. 

      Titin

  • 9. 
    Myofibrils are composed of the proteins myosin and  _________.
    • A. 

      Actin

    • B. 

      Perimysium

    • C. 

      Titin

    • D. 

      Troponin

    • E. 

      Tropomyosin

  • 10. 
    Myosin myofibrils are the _________filaments that provide the active process in contraction.
    • A. 

      Thick

    • B. 

      Thin

  • 11. 
    Actin myofibrils are the __________ filaments that provide an anchor against which the myosin pulls.
    • A. 

      Thick

    • B. 

      Thin

  • 12. 
    _________ are the shared zig zag connections between adjacent sacromeres.
    • A. 

      I bands

    • B. 

      A bands

    • C. 

      Z lines

    • D. 

      M lines

  • 13. 
    _________ are light colored and are composed entirely of actin (thin filaments).
    • A. 

      I bands

    • B. 

      A bands

    • C. 

      Z lines

    • D. 

      M lines

    • E. 

      Sarcomere

  • 14. 
    __________ are dark colored and are located in the central part of the sarcomere.
    • A. 

      I bands

    • B. 

      A bands

    • C. 

      Z lines

    • D. 

      M lines

  • 15. 
    The __________ binds the myosin bundles togther and is located in the center of the A band.
    • A. 

      I band

    • B. 

      Z line

    • C. 

      M line

    • D. 

      Titin

    • E. 

      Troponin

  • 16. 
    The ____________ is the section of the muscle fiber that extends from one Z line to the next.
    • A. 

      Sarcomere

    • B. 

      Sarcolemma

    • C. 

      Sarcoplasma

    • D. 

      Fascicle

  • 17. 
    ________ molecules hold the myosin filaments in place by attaching to the Z line and the end of the myosin like a spring.
    • A. 

      Troponin

    • B. 

      Actin

    • C. 

      Titin

    • D. 

      Tropomyosin

    • E. 

      Myosin

  • 18. 
    Tropomyosin on the actin filament is pulled off of the binding site so the myosin can attach by the globular protein __________.
    • A. 

      Titin

    • B. 

      Troponin

    • C. 

      Aponeuroses

    • D. 

      Osteon

  • 19. 
    During an AP, _____ is released into the sarcoplasm which causes troponin to pull tropomyosin off of the actin binding sites.
    • A. 

      K+

    • B. 

      Ca++

    • C. 

      Na+

    • D. 

      Cl-

  • 20. 
    Each myofibril is wrapped in an interlaced __________ which stores and evenly distributes the Ca++ upon an AP arriving.
    • A. 

      Transverse tubule

    • B. 

      Sarcoplasmic reticulum

    • C. 

      Tropomyosin

    • D. 

      Perimysium

  • 21. 
    __________ are extensions of the sarcolemma that penetrate into the myofibril transversly and transmit extracellular fluid and the action potential into the core of the myofibril.
    • A. 

      Sarcoplasmic reticulum

    • B. 

      Cisternae

    • C. 

      T-tubules

    • D. 

      Cross-bridges

  • 22. 
    The structure in a muscle fiber that consists of 2 sarcoplasmic reticula and one T-tubule is called a __________.
    • A. 

      Cisternae

    • B. 

      Triad

    • C. 

      Olympiad

    • D. 

      Motor unit

  • 23. 
    The neurotransmitter that is used to control skeletal muscle is ___________.
    • A. 

      Troponin

    • B. 

      Acetylcholine

    • C. 

      Actin

    • D. 

      Creatine phosphate

  • 24. 
    After ACh is released across the synaptic cleft and combines with receptor sites on the motor end plate, a __________- gated response takes place.
    • A. 

      Chemically

    • B. 

      Voltage

  • 25. 
    After the End Plate Potential is initiated, channels are opened and the motor end plate depolarizes due to the influx of ___________.
    • A. 

      Na+

    • B. 

      K+

    • C. 

      Ca+

    • D. 

      Cl-

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