Muscle Histology (Msq Drill 202)

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  • 1/29 Questions

    Are type 2A and 2B fibers slow twich or fast twitch?

    • Fast twitch
    • Slow twitch
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  • 2. 

    So, the presence of NADH transferase indicates oxidative capacity?

    • Yes

    • No

    Correct Answer
    A. Yes
  • 3. 

    Which type of muscle fibers are small and make up the neuromuscular spindle. These fibers are microscopic?

    • Intrafusal fibers

    • Extrafusal fibers

    Correct Answer
    A. Intrafusal fibers
  • 4. 

    So, all of the ordinary muscle fibers outside of the spindle are known as intrafusal muscle fibers. True or false?

    • True

    • False

    Correct Answer
    A. False
    Explanation
    They are known as extrafusal. Intrafusal fibers are microscopic and make up the neuromuscular spindle.

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  • 5. 

    What is endomysium made up of?

    • Fibrous connective tissue

    • Fibrocartilaginous connective tissue

    • Hyaluronic acid

    Correct Answer
    A. Fibrous connective tissue
  • 6. 

    Groups of muscles fibers are termed:

    • Myofibrills

    • Fascicles

    • Corpuscles

    Correct Answer
    A. Fascicles
  • 7. 

    The connective tissue capsule that separates or surrounds fascicles is known as the:

    • Epimysium

    • Perimysium

    • Endomysium

    Correct Answer
    A. Perimysium
  • 8. 

    Which of the following muscles has a contractile behavior of: slow twitch?

    • Oxidative or type 1

    • Oxidative glycolytic or type 2A

    • Glycolytic or type 2B

    Correct Answer
    A. Oxidative or type 1
  • 9. 

    Type 2A is therefore both glycolytic and oxidative. Is it fatigue resistant or fatigue sensitive?

    • Fatigue resistant

    • Fatigue sensitive

    Correct Answer
    A. Fatigue resistant
  • 10. 

    Where do the large alpha motor neurons that innervate the extrafusal fibers come from?

    • Dorsal horn cells

    • Anterolateral horn cell

    • Anterior horn cells

    Correct Answer
    A. Anterior horn cells
  • 11. 

    Therefore, what is sensitive to the tension applied by muscle contraction on the tendon?

    • Golgi tendon organ

    • Gamma efferents

    • Type 1A sensory fiber

    Correct Answer
    A. Golgi tendon organ
  • 12. 

    The epimysium surrounds an entire muscle. It is made up of a sheath which contains which three fibers?

    • Cartillagenous

    • Elastic

    • Collagenous

    • Reticular

    Correct Answer(s)
    A. Elastic
    A. Collagenous
    A. Reticular
  • 13. 

    Which of the following secretes the high concentration of hyaluronic acid that is found in the area between the deep fascia and the muscle?

    • Epimysium

    • Perimysium

    • Endomysium

    Correct Answer
    A. Epimysium
  • 14. 

    Do tendons intermingle with the three layers found in skeletal muscles?

    • Yes

    • No

    Correct Answer
    A. Yes
  • 15. 

    The bundles in the perimysium run in opposite directions. True or false?

    • True, they run in opposite directions

    • False, they run in the same direction

    Correct Answer
    A. False, they run in the same direction
  • 16. 

    Each muscle has a mixture of the different types of muscle fibers. True or false?

    • True

    • False

    Correct Answer
    A. True
  • 17. 

    Between type 2A and type 2B which one is glycolytic only?

    • Type 2A

    • Type 2B

    Correct Answer
    A. Type 2B
  • 18. 

    The large alpha myelinated motor fibers innervate the:

    • Intrafusal muscle fibers

    • Extrafusal muscle fibers

    Correct Answer
    A. Extrafusal muscle fibers
  • 19. 

    So, the intrafusal fibers directly or indirectly measure the tension in the extrafusal fibers?

    • Directly

    • Indirectly

    Correct Answer
    A. Indirectly
  • 20. 

    Does the intrafusal muscle fiber also measure the tension applied by muscle contraction on the tendon?

    • Yes, the intrafusal fibers measure tension in the extrafusal fibers and the tendon.

    • No, the intrafusal fibers do not measure the tension applied by the muscle contraction on the tendon.

    Correct Answer
    A. No, the intrafusal fibers do not measure the tension applied by the muscle contraction on the tendon.
  • 21. 

    Muscles are surrounded by deep fascia. What is this deep fascia composed of?

    • Densely packed collagen bundles and fibrous cartillage

    • Densely packed elastic bundles and a fibrous capsule

    • Densely packed collagen fibers and elastic fibers

    • Loosely packed collagen fibers and elastic fibers

    • Loosely packed collagen and a fibrous capsule

    Correct Answer
    A. Densely packed collagen fibers and elastic fibers
  • 22. 

    What does the area of the deep fascia that is adjacent to a muscle contain?

    • A high concentration of synovial fluid

    • A low concentration of synovial fluid

    • A high concentration of hyaluronic acid

    • A low concentration of hyaluronic acid

    Correct Answer
    A. A high concentration of hyaluronic acid
  • 23. 

    What is responsible for the MOTOR innervation of the intrafusal muscle fibers?

    • Small anterior horn cells

    • Alpha efferent neurons

    • Gamma afferents

    • Gamme efferents

    • Alpha afferent neurons

    Correct Answer
    A. Gamme efferents
  • 24. 

    The muscle spindle has sensory receptor innervation that measures the tension state of:

    • Intrafusal muscle fibers only

    • Extrafusal muscle fibers only

    • Both intrafusal and extrafusal fibers

    Correct Answer
    A. Both intrafusal and extrafusal fibers
  • 25. 

    The golgi tendon organs provide information on the state of the tension in the tendons to the CNS or PNS?

    • CNS

    • PNS

    Correct Answer
    A. CNS
  • 26. 

    Since the golgi tendon organs give feedback to the CNS, they are major determinants of organized coordinate muscle control and __________ .

    • Movement

    • Pain and temperature sensation

    • Vibratory sense

    • Propioception

    Correct Answer
    A. Propioception
  • 27. 

    Which of the following invests skeletal muscle?

    • Epimysium

    • Endomysium

    • Perimysium

    Correct Answer
    A. Endomysium
  • 28. 

    If you stained a slow twitch or oxidative muscle fiber what enzyme would you find?

    • Aspartate dehydrogenase

    • Glutamate synthase

    • NADH dehydrogenase

    • NADH transferase

    • Formaldehyde dehydrogenase

    Correct Answer
    A. NADH transferase
  • 29. 

    Endomysium invests skeletal muscle. Which layers fills the spaces between muscle fibers?

    • Epimysium

    • Endomysium

    • Perimysium

    Correct Answer
    A. Endomysium
    Explanation
    To invest: to surround, to inclose

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  • Jan 11, 2013
    Quiz Edited by
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