Quiz 8,9,10

21 Questions

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Medical Quizzes & Trivia

To study duhh.


Questions and Answers
  • 1. 
    _The atrioventricular (AV) node is autorhythmic and sets the rate of heart contraction
    • A. 

      True

    • B. 

      False

  • 2. 
    _During isovolumetric contraction the pressure does not change.
    • A. 

      True

    • B. 

      False

  • 3. 
    _Pacemaker cells do not have a resting membrane potential.
    • A. 

      True

    • B. 

      False

  • 4. 
    _Increasing stroke volume (SV) or heart rate (HR) would result in an increase in Cardiac Output (CO)
    • A. 

      True

    • B. 

      False

  • 5. 
    _The kidneys play a role in stimulating red blood cell production
    • A. 

      True

    • B. 

      False

  • 6. 
    _Normal exhalation is an active process
    • A. 

      True

    • B. 

      False

  • 7. 
    What ion(s) inward flux is responsible for the depolarization from -70mV to -50mV?
    • A. 

      Ca++

    • B. 

      Na+

    • C. 

      K+ and Ca++

    • D. 

      Ca+ and Na+

  • 8. 
    What ion(s) is/are responsible for the depolarization from -50mV to positive values?
    • A. 

      Ca++

    • B. 

      Na++

    • C. 

      Ca+ and Na+

    • D. 

      Super charged ion

  • 9. 
    What ion movement is largely responsible for the rapid repolarization?
    • A. 

      Ca++ out

    • B. 

      Na++ out

    • C. 

      K+ out

    • D. 

      Super charged ion

  • 10. 
    What ion movement is responsible for the “plateau” phase or delay in repolarization near 0mV?
    • A. 

      K+ out

    • B. 

      Ca+ in

  • 11. 
    What is occurring during phase 0 of this potential?
    • A. 

      Rapid depolarization

    • B. 

      Resting membrane potential

  • 12. 
    A person’s respiratory rate is 11 breaths per minute. Their tidal volume is 500ml. What is their minute ventilation?
    • A. 

      5500ml/min

    • B. 

      550ml/min

  • 13. 
    What branch of the nervous system would activate bronchoconstriction?
    • A. 

      Sympathetic

    • B. 

      Parasympathetic

  • 14. 
    This is the lung volume representing the normal volume of air displaced between normal inspiration and expiration when extra effort is not applied. In a healthy, young adult, tidal volume is approximately 500 ml per inspiration or 7 ml/kg of body weight
  • 15. 
    The volume of gas expired from the alveoli to the outside of the body per minute; calculated as the respiratory frequency (f) multiplied by the difference between tidal volume and the dead space (VT − VD); units: ml/min BTPS.
  • 16. 
    Hyperemia due to increased flow of arterial blood in dilated capillaries.
  • 17. 
    Hypermia that due to increase in blood flow after its temporary interruption.
  • 18. 
     refers to a contraction initiated by the myocyte cell itself instead of an outside occurrence or stimulus such as nerve innervation.
  • 19. 
    What is an example of something that would regulate metabolic control of arteriolar tone.
  • 20. 
    Pulmonary ventilation> exchange of gases between lungs and blood> transport of gases between lungs and body tissues> exchange of gases between blood and tissues
  • 21. 
    allows gas exchange to work by diffusion