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Cvp Other > W3 Exam > Flashcards

W3 Exam Flashcards

0
Q
  1. In the systemic capillary beds why is velocity at a minimum?
    a. pressure is very low
    b. resistance is very high
    c. total cross sectional area is very large
    d. lumen of a capillary is very small
A

c. total cross sectional area is very large

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1
Q
  1. The vascular compartment that offers the greatest resistance to flow is which of the following?
    a. aorta
    b. large arteries
    c. small arteries
    d. arterioles
    e. capillaries
A

e. capillaries

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2
Q
  1. What is the physiologic significance of a broad band Doppler reading in the carotid artery?
    a. associated with laminar flow
    b. associated with no flow
    c. associated with turbulent flow
    d. associated with a ruptured vessel
A

c. associated with turbulent flow

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3
Q
  1. Under strong widespread SNS stimulation, which tissue bed would show an increase in local blood flow?
    a. skin
    b. intestines
    c. liver
    d. heart
    e. all of the above
A

d. heart

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4
Q
  1. A large increase in local tissue flow is usually associated with a large increase in systemic arterial blood pressure.
    a. true b. false
A

True

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5
Q
  1. If the velocity of flow is 20 cm/sec in a vessel with a cross sectional area of .5 cm2 . What is the flow rate in that vessel?
    a. 10 ml/min
    b. 40 ml/min
    c. 600 ml/min
    d. cannot determine without the pressure gradient
A

c. 600 ml/min

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6
Q
  1. If the cardiac output is stopped, and a shunt is placed between the aorta and the vena cava, the arterial pressure should drop until it equals which of the following pressures?
    a. it equals the diastolic pressure
    b. it equals the critical closing pressure
    c. it equals the central venous pressure
    d. it equals the mean circulatory filling pressure
A

d. it equals the mean circulatory filling pressure

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7
Q
  1. As the velocity of blood flow decreases, why does viscosity of blood increase?
    a. red blood cells get stuck at constriction points
    b. elements in the blood stick together
    c. red blood cells line up
    d. flow becomes more turbulent
A

b. elements in the blood stick together. All are true at certain times.

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8
Q
  1. At a given flow, the greater the change in pressure along a given length of wall is associated with which of the following?
    a. a greater resistance to flow
    b. a greater cross sectional area
    c. a greater cardiac output
    d. a greater metabolic demand in the tissue
A

.

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9
Q
  1. In response to exercise, what causes vasodilatation in the active muscle increasing local blood flow?
    a. influence of parasympathetic stimulation
    b. influence of sympathetic stimulation
    c. influence of local vasodilators
    d. influence of sympathetic inhibition
A

c. influence of local vasodilators

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10
Q
  1. What effect would increased fibrinogen levels have on viscosity of blood in the Microcirculation?
    a. increase b. decrease c. no effect
A

Increases

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11
Q
  1. What is the probability for turbulent flow in a large diameter vessel with a high velocity of flow?
    a. low b. intermediate c. high d. none
A

high

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12
Q
  1. In a cardiac function curve, as central venous pressure increases, what happens to the cardiac output?
    a. increases b. decreases c. doesn’t change
A

Increases

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13
Q
  1. Lymph drainage from the right leg will reenter the circulation via which of the following vessels?
    a. right lymph duct
    b. thoracic duct
    c. portal duct
    d. ductus venosus
A

Thoracic duct

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14
Q
  1. Stimulation of baroreceptors will have what effect on the pressor center?
    a. stimulate b. inhibit c. no effect
A

inhibit

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15
Q
  1. In response to an increase in demand, new microvessels are formed.
    a. true b. false
A

True

16
Q
  1. The major effect of SNS stimulation on vascular smooth muscle is which of the following?
    a. constriction mediated by alpha receptors
    b. dilation mediated by alpha receptors
    c. constriction mediated by beta receptors
    d. dilation mediated by beta receptors
A

a. constriction mediated by alpha receptors

17
Q
  1. Angiogenic peptides, such as vascular endothelial growth factor, serve what primary function?
    a. stimulate formation of red blood cells
    b. stimulate formation of plasma proteins
    c. are major vasodilator substances
    d. stimulate formation of new blood vessels
A

stimulate formation of new blood vessels

18
Q
  1. When one goes from a lying to a standing position, what happens to the activity of carotid baroreceptors acutely?
    a. increase b. decrease c. doesn’t change
A

.decrease

19
Q
  1. What increases actual colloid osmotic pressure effects by about 50% over calculated values?
    a. increased concentrations of cations in the plasma
    b. undetectable plasma proteins
    c. negative charges on plasma proteins
    d. a very tight capillary endothelium
A

.negative charges on plasma proteins

20
Q
  1. During diastole, perfusion of a tissue bed is maintained by what mechanism?
    a. elastic recoil of the arteries
    b. delayed compliance of the systemic veins
    c. atrial contraction
    d. sympathetic stimulation of the systemic arterial smooth muscles v
A

. elastic recoil of the arteries

21
Q
  1. 2/3 of all lymph at rest is formed from which of the following?
    a. heart and lungs
    b. skeletal muscle
    c. brain
    d. liver and intestines
A

. d. liver and intestines

22
Q
  1. The kidney autoregulates both glomerular filtration rate (GFR) and renal blood flow (RBF) under resting conditions. Considering the architecture of the renal microcirculation, which of the following would increase GFR and decrease RBF if arterial BP was held constant.
    a. constriction of the efferent arterioles
    b. dilation of the efferent arterioles
    c. constriction of the afferent arterioles
    d. dilation of the afferent arterioles
A

.constriction of the efferent arterioles

23
Q
  1. Consider the following data;
    Mean Capillary hydrostatic pressure = 17mm Hg.
    Mean Interstitial hydrostatic pressure = -5mm Hg.
    Mean Capillary colloid osmotic pressure = 28 mm Hg.
    Mean Interstitial colloid osmotic pressure = 6 mm Hg.
    At this point in time filtration is _____ reabsorption.
    a. greater than b. equal to c. less than
A

.b. equal to

24
Q
  1. If the central venous pressure equals the mean circulation filling pressure, what can be said about the venous return?
    a. it is normal
    b. it is elevated
    c. it is depressed
    d. it is non existent
A

.d. it is non existent

25
Q
  1. When considering exchange across the capillary wall, how would a larger non lipid soluble molecule cross the wall?
    a. passive diffusion
    b. ultrafiltration
    c. vesicular transport
    d. forget about it
A

.c. vesicular transport

26
Q

What are the common vasodilators?

A 
– Adenosine 
– CO2 
– K+  
– Histamine 
– Lactic acid

Cvp Other (5 decks)

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