Biology for IGCSE & O level - Excretion In Humans (Section 3 - No. 20)
What causes the high pressure in the glomerulus that allows for filtration?
The high blood pressure in the renal vein.
The afferent arteriole is wider than the efferent arteriole.
The efferent arteriole is wider than the afferent arteriole.
The low blood pressure in the renal artery.
Explanation
The afferent arteriole is wider than the efferent arteriole, this causes pressure to increase inside the glomerulus and causes blood to be filtered.
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