Biology for IGCSE & O level - Excretion In Humans (Section 2 - No. 40)
Which process is the main reason for the high blood pressure in the glomerulus?
The constriction of the efferent arteriole.
The dilation of the afferent arteriole.
The lower resistance in the afferent arteriole compared to the efferent arteriole.
The high blood pressure in the renal vein.
Explanation
The wider afferent arteriole compared to the efferent arteriole allows a high volume of blood into the glomerulus but restricts the outflow, leading to the high blood pressure.
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