Otterbein/CRNA A&p Midterm Review - Respiratory

47 Questions | Total Attempts: 50

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Otterbein/CRNA A&p Midterm Review - Respiratory

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Questions and Answers
  • 1. 
    The diaphragm is innervated by the phrenic nerve originating from which 3 cervical nerves?
  • 2. 
    Boat-rocking, or paradoxical movement, occurs when:
    • A. 

      Patient is medically paralyzed.

    • B. 

      When the airway is obstructed.

    • C. 

      When you tell your friend that those jeans do make her look fat.

  • 3. 
    Interscalene blocks always affect the _____ nerve, causing a hemidiaphragm.
  • 4. 
    During inspiration, the intrapleural space becomes more negative, making intrapulmonary pressure more negative - this can be up to -90 cmH2O.  
    • A. 

      True

    • B. 

      False

  • 5. 
    Normal ______ is passive recoil without contraction, the lungs and chest wall are elastic which cause the intrapulmonary pressure to return to near zero at end expiration.
  • 6. 
    Which two laws of physics contribute to resistance in the lungs?LL
    • A. 

      Law of Laplace

    • B. 

      Poisuelle's law

    • C. 

      Bernoulli's

  • 7. 
    Lung compliance is increased with emphysema.
    • A. 

      True

    • B. 

      False

  • 8. 
    Normal lung compliance is ___ mL/cmH2O
  • 9. 
    Which of the following is not true about the dorsal respiratory group?
    • A. 

      Responsible for the basic rhythm of ventilation.

    • B. 

      Sends impulses via the phrenic and external intercostal nerves to the diaphragm and external intercostal muscles.

    • C. 

      Controls expiration with forceful breathing

    • D. 

      Intrinsic periodic firing

  • 10. 
    The _____ respiratory group deals mostly with expiration.
  • 11. 
    Central chemoreceptors are located in the _____ surface of the medulla.
  • 12. 
    Central chemoreceptors respond to changes in pO2.
    • A. 

      True

    • B. 

      False

  • 13. 
    Changes in pCO2 are the most important stimulus to ventilation because CO2 is soluble and readily crosses the blood brain barrier, where H+ and HCO3- are polar and do not cross.
    • A. 

      True

    • B. 

      False

  • 14. 
    Carotid bodies and aortic bodies are the location of _______ chemoreceptors.
  • 15. 
    Peripheral chemoreceptors respond to decreases in ARTERIAL pO2 and pH and somewhat to increases in pCO2. 
    • A. 

      True

    • B. 

      False

  • 16. 
    The rate of diffusion is directly proportional to:
    • A. 

      Surface area

    • B. 

      Partial pressure difference of gas

    • C. 

      Solubility of gas

    • D. 

      Thickness of the membrane

    • E. 

      Square root of the molecular weight

  • 17. 
    _% of cardiac output goes to lung parynchema, not participating in gas exchange.
  • 18. 
    What is the partial pressure of inspired O2 in room air at sea level? Round to the nearest whole number.
  • 19. 
    PiO2 - (PACO2/RQ) is the equation for ______ PO2.  This is determined by the balance of O2 removal and replenishment.
  • 20. 
    Your patient's A-a gradient and CO2 gradient is greater than normal, this implies a ____ mismatch.
  • 21. 
    What is the equation for total O2 delivered?
  • 22. 
    The body requires 120-200 mL/min of O2.
    • A. 

      True

    • B. 

      False

  • 23. 
    Henry's law applies to _________ oxygen.  It states that each 1 mmHg of PO2 dissolves into 0.003 mL O2/100 mL of blood.
  • 24. 
    1 gram of Hgb contains ____ mL of O2.
  • 25. 
    All of the following cause O2 dissociation curve to shift to the right (O2 affinity for hgb is reduced) EXCEPT:
    • A. 

      Increase in H ion concentration

    • B. 

      Increase in temperature

    • C. 

      Increase in CO levels

    • D. 

      Sickle cell anemia

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