Chapter 5 - Doppler Principles

63 Questions | Total Attempts: 161

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Chapter 5 - Doppler Principles

Questions and Answers
  • 1. 
    Which of the following are parts of the circulatory system?
    • A. 

      Heart

    • B. 

      Cerebral Ventricle

    • C. 

      Artery

    • D. 

      Arteriole

    • E. 

      Capillary

    • F. 

      Bile Duct

    • G. 

      Venule

    • H. 

      Vein

  • 2. 
    The _____ are the tiniest vessles in the circulatory system?
    • A. 

      Vein

    • B. 

      Capillaries

    • C. 

      Arteries

  • 3. 
    In which of the following can Doppler ultrasound detect flow?
    • A. 

      Heart

    • B. 

      Arteries

    • C. 

      Arterioles

    • D. 

      Capillaries

    • E. 

      Venules

    • F. 

      Veins

  • 4. 
    To flow is to move in a ______.
    • A. 

      Direction

    • B. 

      Pattern

    • C. 

      Stream

  • 5. 
    The characteristic of a fluid that offers resistance to flow is called?
    • A. 

      Resistance

    • B. 

      Viscosity

    • C. 

      Inertia

    • D. 

      Impedance

    • E. 

      Density

  • 6. 
    Poise is a unit of
    • A. 

      Visocity

    • B. 

      Friction

    • C. 

      Inertia

  • 7. 
    Pressure is ______ per unit area.
    • A. 

      Force

    • B. 

      Fricition

    • C. 

      Liquid

  • 8. 
    If the pressure is greater at one end of the liquid-filled tube or vessle than it is at the other, the liquid will flow from the _____ pressure and to the _____ pressure end.
    • A. 

      Higher, lower

    • B. 

      Lower, higher

    • C. 

      Depends on the liquid

    • D. 

      All of the above

    • E. 

      None of the above

  • 9. 
    Flow increases if _____ increase(s).
    • A. 

      Pressure difference

    • B. 

      Pressure gradient

    • C. 

      Resistance

    • D. 

      A and B

    • E. 

      All of the above

  • 10. 
    As flow resistance increases, volumetic flow rate will
    • A. 

      Increase

    • B. 

      Decrease

    • C. 

      Stay the same

  • 11. 
    If pressure difference is doubled, volumetric flow rate is
    • A. 

      Unchanged

    • B. 

      Quartered

    • C. 

      Halved

    • D. 

      Doubled

    • E. 

      Quadrupled

  • 12. 
    If flow resistance is doubled, volumetric flow rate is
    • A. 

      Unchanged

    • B. 

      Quartered

    • C. 

      Halved

    • D. 

      Doubled

    • E. 

      Quadrupled

  • 13. 
    Flow resistance in a vessel depends on _______.
    • A. 

      Vessel length

    • B. 

      Vessel radius

    • C. 

      Blood viscosity

    • D. 

      All of the above

    • E. 

      None of the above

  • 14. 
    Flow resistance decreases with an increase in ______.
    • A. 

      Svessel length

    • B. 

      Vessel radius

    • C. 

      Blood viscosity

    • D. 

      All of the above

    • E. 

      None of the above

  • 15. 
    Flow resistance depends most strongly on ____.
    • A. 

      Vessel length

    • B. 

      Vessel radius

    • C. 

      Blood viscosity

    • D. 

      All of the above

    • E. 

      None of the above

  • 16. 
    Volumetric flow rate decreases with an increase in ____.
    • A. 

      Pressure difference

    • B. 

      Vessel radius

    • C. 

      Vessel length

    • D. 

      Blood viscosity

    • E. 

      C and d

  • 17. 
    When the speed of a fluid is constant across a vessel, the flow is called _____ flow.
    • A. 

      Volume

    • B. 

      Parabolic

    • C. 

      Laminar

    • D. 

      Viscous

    • E. 

      Plug

  • 18. 
    __________ flow occurs wen straight parallel streamlines describing the flow are altered.
    • A. 

      Disturbed

    • B. 

      Turbulent

    • C. 

      Plug

    • D. 

      Viscous

  • 19. 
    _____________ flow involves random and chaotic flow patterns, with particles flowing in all directions.
    • A. 

      Disturbed

    • B. 

      Turbulent

    • C. 

      Plug

    • D. 

      Viscous

  • 20. 
    Turbulent flow is more likely proximal or distal to a stenosis
    • A. 

      Proximal

    • B. 

      Distal

  • 21. 
    A narrowing of the lumen of a tube is called a _________.
    • A. 

      Stenosis

    • B. 

      Pulsatile

    • C. 

      Disturbed

  • 22. 
    Proximal to , at, and distal to a stenosis ________, must be constant.
    • A. 

      Laminar flow

    • B. 

      Disturbed flow

    • C. 

      Turbulent flow

    • D. 

      Volumetic flow rate

    • E. 

      None of the above

  • 23. 
    Poiseuille's equation predicts a(n) ________ in flow speed with a decrease in vessel radius.  
    • A. 

      Decrease

    • B. 

      Increase

  • 24. 
    In a stenosis, the pressure if _______ the proximal and distal values.
    • A. 

      Less than

    • B. 

      Equal to

    • C. 

      Greater than

    • D. 

      Depends on the fuild

    • E. 

      None of the above

  • 25. 
    The _______ effect is used to detect and measure ________ in vessels.
    • A. 

      Doppler, flow

    • B. 

      Poiseuille's, velocity

    • C. 

      Color, flow

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