Determine which of the following statements concerning extrinsic regulation of GFR is inaccurate.

• A. High blood pressure stimulates the sympathetic nerve fibers to produce norepinephrine, which causes vasoconstriction.
• B. Vasoconstriction of the afferent arterioles decreases GFR, thereby restoring blood volume and pressure to normal.
• C. Low blood pressure causes the granular cells of the juxtaglomerular complex to release renin.
• D. Renin activates Angiotensin II, which promotes vasoconstriction and hence raises blood pressure.

Answer: (A)