circulatory energy properties kaye's class

  1. what is the primary form of energy in circulating blood
    pressure energy
  2. ____ demonstrates that the velocity of the steady flow of a fluid through a narrow tube(such as a blood vessel ) varies directly as the pressure and the fourth power of the radius of the tube and inversely as the length of the tube and the coefficient of viscosity
    Poiseuille's law
  3. two types of potential energy are
    pressure and gravitational
  4. what is the normal arterial flow generated by cardiac contractions systole and diastole
    pulsatile flow
  5. with the type of flow are there minimal energy losses due to friction
    laminar flow
  6. distrubed flow can be either normal or abnormal
    true
  7. the force that must be overcome to push blood through the circulatory system and create flow is called
    resistance
  8. in order for poiseuille's law to be accurate which two assumptions must be made
    fluid must be incompressible and flow must be laminar
  9. the factor having the single most dramatic effect on blood flow according to poiseuille's law is
    radius of the vessel
  10. how does flow in the internal carotid artery ICA normally differ than flow in the external carotid artery ECA
    the ICA has less peripheral resistance than the ECA
  11. a 75% area reduction equates to a diameter reduction of
    50%
  12. turbulent flow is predicted when the Reynolds number is
    2000
  13. high-resistance doppler flow signals were obtained from the right ICA while low-resistance flow signals were obtained from the left ICA. what does this most likely suggest
    hemodynamically significant distal disease on the right
  14. according to Bernoulli, in a stenosis where will the lowest pressure be found
    directly within the stenosis
  15. poiseuille's law defines the relationship between
    resistance, pressure, and volume flow
  16. which of the statements is most accurate regarding post-stenotic term turbulence PST
    doppler waveforms would display spectral broadening
  17. spectral broadening usually represents
    turbulent flow
  18. which of the following is NOT associated with vasodilation of a high resistance bed
    stress
  19. which of the following are associated with vasodilation of a high resistance bed
    stenosis, exercise, body heating
  20. what is reactive hyperemia
    sudden blood flow to an area previously deprived of blood
  21. related to local control, blood flow into the tissue is regulated by what
    the nutritional needs of the tissue
  22. which of the physiological control deals with hormonal regulation of systemic blood pressure
    humoral control
  23. ______performs an important role in determining the resistivity of a vascular bed
    autoregulation
  24. the four physiological controls of systemic circulation are
    neural control, local control, humoral control and autoregulation
  25. what is the energy of movement
    kinetic
  26. as energy moves through the arterial system friction causes conversion to
    heat
  27. flow only moves in a direction that forms a ____ state to a ____ state
    high pressure  to low pressure
  28. resistance is
    the measure of impedance that must be overcome in order for flow to occur
  29. as viscosity and resistance increase what happens to velocity
    decreases
  30. what two things are required to allow for fluid movement from one point to another
    a pathway and a pressure gradient
  31. what is another name for gravitational energy
    hydrostatic pressur
  32. the normal arterial flow generated by cardiac contractions systole/diastole is
    pulsatile flow
  33. the Reynold's number is a unitless and dimensionless number that is a
    predictor of turbulence
  34. the formula for kinetic energy is K=(M/2)V^2. what factor has the greatest influence on kinetic energy
    velocity
  35. when an area of a vessel is reduced by 75% when the diameter is reduced by
    50%
  36. in a normal patient exercise will cause an ___ in diastolic flow and a (an) ___ resistance to flow
    increase/ decrease
  37. Bernoullis principle demonstrates that if velocity increases then pressure
    decreases
  38. what type of flow is seen directly following a stenosis
    turbulent with presence of spectral broadening
  39. a type of hyperemia caused by external factors such as a stress or cold, which causes the distal beds of the extremities to not be fed at that time
    reactive hyperemia
  40. what type of beds does the common carotid arteries feed
    both high and low resistance beds
  41. the three types of energy loss are
    frictional, viscous, inertial
  42. this flow normally occurs in the boundary layer of the vessel
    flow separation
  43. the opposition that blood encounters as it attempts to perfuse an organ or distal tissue bed is called
    peripheral resistance
  44. this flow is less organized by remains somewhat streamlined
    disturbed flow
  45. chaotic, multi-directional flow that exhibits a mosaic appearance on color doppler is
    turbulent flow
  46. spectral broadening refers to
    a classic " closed window" appearance of the waveform associated with turbulent flow
  47. cold temperatures can cause arterioles to be less resistant to flow
    true
  48. pressure creates flow by overcoming resistance
    true
  49. hydration/dehydration affect viscosity
    true
  50. phasic flow is the normal venous flow resulting from respiration (breathing)
    true
  51. the greater the energy difference/gradient or lower the resistance the greater the flow
    true
  52. resistance is influenced by vessel length, vessel radius, and the viscosity of the blood
    true
  53. Reyolnd's number < 1500 predicts laminar flow and > 2000 predicts turbulent flow
    true
  54. diameter is one-dimensional measurement and area is a two-dimensional measurement
    true
  55. where there is peripheral vasodilation the normally high resistance flow pattern becomes low resistance
    true
  56. a hemodynamically significant stenosis will produce waveform characteristics consistent with the Bernoulli stenosis profile
    true
Author
139shay
ID
348560
Card Set
circulatory energy properties kaye's class
Description
circulatory energy properties kaye's class
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