In which of the following would vascular resistance be the least?
A)a vessel < 30 μm in diameter
B)a vessel 10 microns in diameter
C)a vessel 8 μm in diameter
D)a vessel 1 mm in diameter
E)a vessel 1 cm in diameter
If venous pressures in the venules range from 17-21 mm Hg and pressures in the venae cavae range from 2-4 mm Hg, what is the pressure range of the driving force pushing blood through the venous system?
A)2-4 mm Hg
B)13-19 mm Hg
C)15-17 mm Hg
D)19-25 mm Hg
E)21-23 mm Hg
Why is the osmotic pressure higher in the blood compared to that in the surrounding interstitial fluid?
A)Interstitial fluid contains more dissolved proteins than blood.
B)Blood has lower solute concentrations.
C)Interstitial fluid has higher solute concentrations.
D)There are equal concentrations of dissolved proteins in blood and interstitial fluid.
E)Blood contains more dissolved proteins than does interstitial fluid.
As blood travels from the aorta toward the capillaries,
A)cardiovascular pressure decreases.
B)vascular resistance decreases.
C)vascular flow increases.
E)both cardiovascular pressure and vascular flow increase.