Why is efferent arteriole narrower than afferent arteriole?
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Bec it has to develop the pressure through which I filteration will take place if we reverse the parameters then no filteration will take place
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The diameter of efferent arteriole is less than that of the afferent arteriole because pressure builds up in the arteriole and some of the fluid is forced to go through the gaps in cells of Bowman's capsule (podocytes). This filters the blood, and this process is called ultrafiltration.
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