Final answer:
Prostaglandins and angiotensin II act on the afferent arterioles of the nephron to regulate blood pressure and glomerular filtration rate.
Step-by-step explanation:
Prostaglandins and angiotensin II act on the afferent arterioles of the nephron.
Prostaglandins cause vasodilation, which increases blood flow to the glomerulus, while angiotensin II causes vasoconstriction, reducing blood flow to the glomerulus.
Both of these actions help regulate blood pressure and maintain glomerular filtration rate.