The principal nitrogenous excretory compound in humans is synthesised
A. In kidneys but eliminated mostly through liver
B. In liver and also eliminated by the same through bile
C. In kidneys as well as eliminated by kidneys
D. In the liver but eliminated mostly through kidneys
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Why do capillary beds have such low pressure?
A. The don’t, they have very high blood pressure to force the diffusion of oxygen and nutrients into cells.
B. Fluid loss from arteries is high enought that pressure drops by the time blood reaches capillaries.
C. The total cross-section diameter of the arterial circulation increases with progression from the artery to arteriole to capillary,leading to reduced blood pressure.
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