Neuromuscular System-sem 2 Yr 1

17 Questions | Total Attempts: 257

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Muscle Quizzes & Trivia

Test one for the neuromsk skel syst 2010 semester 2


Questions and Answers
  • 1. 
    Where and when does the myosin crossbridge attach?
    • A. 

      On troponin when calcium is low

    • B. 

      On troponin c when calcium is high

    • C. 

      On actin when calcium is high

    • D. 

      On the sarcomere when sodium is high

    • E. 

      On actin when calcium is low

  • 2. 
    Fiber types within the skeletal muscle generating force and movement are?
    • A. 

      Intrafusal

    • B. 

      Thick filament

    • C. 

      Extrafusal

    • D. 

      Thin filament

    • E. 

      Nuclear chain fibers

  • 3. 
    What does the process of active state require?
    • A. 

      Extracellular calcium increase

    • B. 

      Intracellular calcium increase

    • C. 

      Intracellular calcium increase and ATP

    • D. 

      Extracellular calcium decrease

    • E. 

      ATP

  • 4. 
    Contraction is the result of:
    • A. 

      An incease number of crossbridge attachments

    • B. 

      Calcium at its basal level

    • C. 

      An increase of actin filaments

    • D. 

      Decreasing extracellular calcium

    • E. 

      Loss of ATP

  • 5. 
    Where is the storage facility of ATP in the sarcomere?
    • A. 

      Calcium

    • B. 

      Sodium

    • C. 

      Actin

    • D. 

      Myosin

    • E. 

      Troponin C

  • 6. 
    If the muscle ends are clamped at a fixed length prior to the contraction, and the muscle length cannot decrease as the muscle's cell contract, is it :
    • A. 

      Concentric contraction

    • B. 

      Isotonic contraction

    • C. 

      Eccentric contraction

    • D. 

      Auxotonic contraction

    • E. 

      Isometric contraction

  • 7. 
    What is the signal for contraction?
    • A. 

      Sodium

    • B. 

      Actin

    • C. 

      Myosin

    • D. 

      Calcium pulse

    • E. 

      Twitch

  • 8. 
    What second messenger is involved in the binding of myosin to actin in skeletal muscle and cardiac muscle
    • A. 

      Calcium

    • B. 

      Tropomyosin

    • C. 

      Troponin c

    • D. 

      Myosin

    • E. 

      ATP

  • 9. 
    When is ATP initially used in the crossbridge cycle?
    • A. 

      In rigor mortis

    • B. 

      In relaxation

    • C. 

      In excitation

    • D. 

      In hydrolysis

    • E. 

      In product release

  • 10. 
    What is the most efficient method of ATP generation?
    • A. 

      Glycolysis

    • B. 

      Phosphorylation

    • C. 

      Gluconeogenesis

    • D. 

      Oxidation of fatty acids

    • E. 

      Chemiosmosis

  • 11. 
    A muscle showing to have a slow myosin isoenzyme (ATPase rate)/contraction timemoderate Sr pump capacitymoderate diffusion diametersmall motor neuron sizehigh oxidative capacity:mt content, capillary density,myoglobin contenthigh fatigue resistancemoderate glycolytic capacitylow forceaerobic activitytriglycerides as storage fuelis what type?
    • A. 

      Type 11B/ fg/ ft-b/fast glycolytic/white

    • B. 

      Type 11A/fog/ft-a/fast oxidative/red

    • C. 

      Type 1/so/slow oxidative/white

    • D. 

      Type 1A/fog/ft-a/fast oxidative/red

    • E. 

      Type 2/so/slow oxidative/white

  • 12. 
    A muscle showing to have a very fast myosin isoenzyme (ATPase rate)/contraction timehigh Sr pump capacityhigh diffusion diametervery large motor neuron sizelow oxidative capacity:mt content, capillary density,myoglobin contentlow fatigue resistancehigh glycolytic capacityvery high forceshort term aerobic activitycp,O2 as storage fuelis what type?
    • A. 

      Type 11B/ fg/ ft-b/fast glycolytic/white

    • B. 

      Type 11A/fog/ft-a/fast oxidative/red

    • C. 

      Type 1/so/slow oxidative/white

    • D. 

      Type 1A/fog/ft-a/fast oxidative/red

    • E. 

      Type 2/so/slow oxidative/white

  • 13. 
    A muscle showing to have a fast myosin isoenzyme (ATPase rate)/contraction timehigh Sr pump capacitysmall diffusion diameter large motor neuron sizevery high oxidative capacity:mt content, capillary density,myoglobin contentmedium fatigue resistancehigh glycolytic capacityv high forcelong term aerobic activitycp,O2 as storage fuelis what type?
    • A. 

      Type 11B/ fg/ ft-b/fast glycolytic/white

    • B. 

      Type 11A/fog/ft-a/fast oxidative/red

    • C. 

      Type 1/so/slow oxidative/white

    • D. 

      Type 1A/fog/ft-a/fast oxidative/red

    • E. 

      Type 2/so/slow oxidative/white

  • 14. 
    After a muscle relaxes and the compression of the vessels are relieved there is a sustained increase in blood flow. This is called?
    • A. 

      Hypertrophy

    • B. 

      Hypoxia

    • C. 

      Maximal voluntary contraction

    • D. 

      Reactive hyperemia

    • E. 

      Hyporemia

  • 15. 
    Energy expenditure that is greater than oxidative resupply of enegy during exercise is called:
    • A. 

      Oxygen deficit

    • B. 

      Oxygen debt

    • C. 

      Hypoxia

    • D. 

      Hyperemia

    • E. 

      Oxygen depletion

  • 16. 
    Which motor units are recruited first?
    • A. 

      Small

    • B. 

      Type 2

    • C. 

      Medium

    • D. 

      Type 1

    • E. 

      Large

  • 17. 
    Which is not a primary cause of cellular fatigue in the muscle cell?
    • A. 

      Increased intracellular ADP

    • B. 

      Metabolic waste- lactic acid and phosphate

    • C. 

      Slowed type 2 motor units

    • D. 

      Depletion of ACh

    • E. 

      Increased intracellular potassium

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