Muscle Physiology Quiz

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face12
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136570
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Muscle Physiology Quiz
Updated:
2012-02-20 19:32:27
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ACC Christensen Physiology Spring 2012
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Quiz on Muscle Notes for Exam 2
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  1. Spindle-shaped cells with central nuclei, no striations

    A. Cardiac Muscle
    B. Smooth Muscle
    C. Skeletal Muscle
    B. Smooth Muscle
    (this multiple choice question has been scrambled)
  2. Long, cylindrical, unbranched, multinucleated cells; nuclei located toward the periphery of the cell

    A. Cardiac Muscle
    B. Smooth Muscle
    C. Skeletal Muscle
    C. Skeletal muscle
    (this multiple choice question has been scrambled)
  3. Striated; cells are uninucleated & branched; nuclei are centrally located

    A. Cardiac Muscle
    B. Smooth Muscle
    C. Skeletal Muscle
    A. Cardiac Muscle
    (this multiple choice question has been scrambled)
  4. Which of the following is not a function of Skeletal muscle?

    A. Heat production
    B. Joint Stability
    C. Motion
    D. Sensory detection
    E. Maintenas of posture
    D. Sensory Detection
    (this multiple choice question has been scrambled)
  5. Muscle returns to its original shape after contraction or extension

    A. Elasticity
    B. Excitability
    C. Contractility
    D. Extensibility
    A. Elasticity
    (this multiple choice question has been scrambled)
  6. Muscle extends (stretches)

    A. Excitability
    B. Contractility
    C. Elasticity
    D. Extensibility
    D. Extensibility
    (this multiple choice question has been scrambled)
  7. Muscle contracts (shortens and thickens)

    A. Contractility
    B. Extensibility
    C. Elasticity
    D. Excitability
    A. Contractility
    (this multiple choice question has been scrambled)
  8. Muscle receives and responds to stimuli (environmental changes inside or outside the body)

    A. Contractility
    B. Elasticity
    C. Extensibility
    D. Excitability
    D. Excitability
    (this multiple choice question has been scrambled)
  9. A muscle fiber is the same as a fiber found in connective tissue.

    A. True
    B. False
    B. False (different)
  10. Individal muscle fiber = a muscle cell

    A. True
    B. False
    A. True
  11. What is the plasma or cell membrane of a muscle cell

    A. Sarcoplasmic Reticulum
    B. Sarcoplasm
    C. Sarcolemma
    D, Transverse (T) Tubules
    E. Myofibrils
    C. Sarcolemma
    (this multiple choice question has been scrambled)
  12. Cylindrical structures that run longitudinally through the myofiber; composed of thin and thick myofilaments

    A. Sarcolemma
    B. Sarcoplasm
    C. Sarcoplasmic Reticulum
    D, Transverse (T) Tubules
    E. Myofibrils
    E. Myofibrils
  13. Form of smooth endoplasmic reticulum; regulates intracellular levels of cascium

    A. Sarcoplasmic Reticulum
    B. Sarcolemma
    C. Sarcoplasm
    D, Transverse (T) Tubules
    E. Myofibrils
    A. Sarcoplasmic Reticulum
    (this multiple choice question has been scrambled)
  14. Cytoplasm; contains many nuclei. Contains large amounts of stored glycogen & a unique oxygen binding protein called myoglobin

    A. Sarcolemma
    B. Sarcoplasmic Reticulum
    C. Sarcoplasm
    D, Transverse (T) Tubules
    E. Myofibrils
    C. Sarcoplasm
    (this multiple choice question has been scrambled)
  15. Tunnel-like extensions of the sarcolemma tha ope to the exterior of the myofiber, found at each A-1 junction

    A. Sarcolemma
    B. Sarcoplasm
    C. Sarcoplasmic Reticulum
    D, Transverse (T) Tubules
    E. Myofibrils
    D. Transverse (T) Tubules
  16. The 3 proteins actin, tropomyosin, & troponin are part of which myofilaments

    A. Thick
    B. Thin
    B. Thin
  17. Predominant protein; the backbone of each thin filament is formed by two strands of actin that coil around each other (looks like a twisted double strand of pearls); the actin molecule contains a myosin-binding site for a myosin molecule

    A. Tropmyosin
    B. Actin
    C. Troponin
    B. Actin
    (this multiple choice question has been scrambled)
  18. Tropomyosin spirals around the actin backbone; in the absence of calcium, tropomyosin blocks myosin from binding to actin.

    A. Actin
    B. Tropmyosin
    C. Troponin
    B. Tropomyosin
    (this multiple choice question has been scrambled)
  19. Complex of three protein molecules; one
    binds to actin, another binds to tropomyosin, & the third binds to calcium ions; when calcium is present, troponin moves tropomyosin out of the way so that myosin can bind to actin.

    A. Troponin
    B. Actin
    C. Tropmyosin
    A. Troponin
    (this multiple choice question has been scrambled)
  20. What is the smallest contractile unit of a muscle cell
    Sarcomeres
  21. The number of myofibers per motor unit is higher in muscles that exert fine control and higher in muscles whose movements are less precise.

    A. True
    B. False
    False
  22. Which of these structures is not part of a neuromuscular junction?

    A. Synaptic end bulb
    B. Motor end plate
    C. all are part of junction
    D. Synaptic vesicles
    E. acetylcholine
    C. all are part of junction
    (this multiple choice question has been scrambled)
  23. The 3 major processes of skeletal muscle cell contraction are:

    A. Excitation/Inhibition
    B. Excitation
    C. Mechanism of contraction
    D. Excitation/Contraction Coupling
    B, C, D

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