Chapter 5 - Doppler Principles
- 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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