Bsf Mock Block 2 - Skeletal & Smooth Muscle

15 Questions | Total Attempts: 36

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Bsf Mock Block 2 - Skeletal & Smooth Muscle

Mock block 2 exam for Touro BSF course - Fall 2010.


Questions and Answers
  • 1. 
    The repeating subunits of a skeletal muscle myofibril that is also known as the basic contractile unit is called a _____.
    • A. 

      Myofilament

    • B. 

      Sarcomere

    • C. 

      Myofiber

    • D. 

      Actin & myosin complex

    • E. 

      Troponin & tropomyosin complex

  • 2. 
    Which of the following would you expect to find located within the H band?
    • A. 

      Actin

    • B. 

      Troponin

    • C. 

      Tropomyosin

    • D. 

      Meromyosin

    • E. 

      None of the above

  • 3. 
    Which of the following is responsible for blocking the myosin head binding site in a relaxed muscle?
    • A. 

      Tropomyosin

    • B. 

      Troponin T

    • C. 

      Troponin I

    • D. 

      Troponin C

    • E. 

      More than one of the above

  • 4. 
    In skeletal muscle contraction, only the H and I bands shorten.
    • A. 

      True

    • B. 

      False

  • 5. 
    Where would you expect to find a transverse-tubule with its relationship to a sarcomere?
    • A. 

      At the z-disc or z-line

    • B. 

      Z-I junction

    • C. 

      A-I junction

    • D. 

      A-H junction

    • E. 

      H-M junction

  • 6. 
    Which of the following best describes sarcoplasmic reticulum?
    • A. 

      Organelle derived from smooth ER that stores potassium

    • B. 

      Organelle derived from smooth ER that stores calcium

    • C. 

      Organelle derived from rough ER that stores potassium

    • D. 

      Organelle derived from rough ER that stores calcium

  • 7. 
    Your patient comes to your office complaining of an unusual muscle spasm problem in her gluteal region. You suspect a hypertensive muscle in that area and decide to administer a gluteal injection in the superior lateral quadrant to avoid damaging the sciatic nerve.Which of the following would you expect to find in your syringe?
    • A. 

      Acetylcholine

    • B. 

      Epinephrine

    • C. 

      Dihydropyridine

    • D. 

      Ryanodine

    • E. 

      Calcium infused isotonic fluid

  • 8. 
    If you applied a ryanodine receptor inhibitor to a patient, would you expect the sarcoplasmic concentrations of calcium to increase during muscle contraction efforts?For the sake of this question, assume that your RyR inhibitor blocks 100% of their target receptors. Also, ignore extracellular calcium.
    • A. 

      Yes

    • B. 

      No

    • C. 

      Maybe

  • 9. 
    The muscle fiber type that is categorized as being relatively smaller, red due to the presence of myoglobin, and has a higher concentration of mitochondria is also known as a _____ muscle fiber.
    • A. 

      Type I

    • B. 

      Type II a

    • C. 

      Type II b

    • D. 

      White

  • 10. 
    The CT associated with skeletal muscle is necessary for mechanical transmission of the contractile force generated by the myofibers.
    • A. 

      True

    • B. 

      False

  • 11. 
    Muscle weakness characterized by a higher amount of satellite cell repair in muscle tissue is based on the absence of which protein?
    • A. 

      A-actinin

    • B. 

      Dystrophin

    • C. 

      Desmin

    • D. 

      Titin

  • 12. 
    Which of the following is absent in smooth muscle but found in skeletal muscle?
    • A. 

      Actin

    • B. 

      Tropomyosin

    • C. 

      Troponin

    • D. 

      Myosin

    • E. 

      Desmin

  • 13. 
    Which of the following blocks the actin binding site in smooth muscle?
    • A. 

      Troponin

    • B. 

      Calmodulin

    • C. 

      Caveolae

    • D. 

      Myosin light chain

  • 14. 
    Your patient comes to your office complaining of pain in her abdomen due to a blunt trauma accident. With your knowledge in anatomy, you know that the GI tract is lined with smooth muscles. If you suspect damage to her smooth muscles in the GI tract, which of the following best describes the repair mechanism of the tissue located there?
    • A. 

      Repair through satellite cells

    • B. 

      Repair through fibroblasts

    • C. 

      Mitosis of new cells

  • 15. 
    Skeletal muscle t-tubules:
    • A. 

      Line up with the z-disc

    • B. 

      Are invaginations of the sarcolemma

    • C. 

      Have connexons

    • D. 

      More than one of the above

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