Why diameter of afferent arterial is bigger than efferent
arteriole
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This is to create more pressure in the efferent arteriole coz the blood coming out of it need more force to travel through PCT -loop of Henley -DCT
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The efferent arteriole carries blood away from the glomerulus. Because it has a smaller diameter than the afferent arteriole, it creates some resistance to blood flow, producing the back-up of blood in the glomerulus which creates higher pressure in the glomerular cavity.
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