Constriction of the efferent arteriole increases blood pressure in the glomerulus, which increases GFR.

Name: Constriction of the efferent arteriole increases blood pressure in the glomerulus, which increases GFR.
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Constriction of the efferent arteriole increases resistance to blood flow, resulting in an increase in pressure upstream in the glomerulus. This increased pressure leads to an increase in GFR (glomerular filtration rate) as more fluid is filtered out of the blood.

Constriction of the Efferent Arteriole Increases Blood Pressure in the Glomerulus