Final answer:
The false statement is that 'systemic vasoconstrictors cause increased GFR.' Systemic vasoconstrictors increase blood pressure but can decrease GFR by constricting kidney arterioles, contrary to the systemic effect.
Step-by-step explanation:
The statement regarding glomerular filtration rate (GFR) that is FALSE is: 'systemic vasoconstrictors cause increased GFR'. Systemic vasoconstrictors would generally lead to an increase in systemic blood pressure, but do not necessarily increase GFR because they can also constrict the afferent arterioles leading to the glomerulus, which would actually decrease the GFR. The correct relationship between GFR and the arterioles would be that dilation of the renal afferent arteriole leads to an increased GFR by allowing more blood to enter the glomerulus, while constriction of the renal afferent arteriole decreases GFR by reducing blood flow into the glomerulus. On the contrary, dilation of the renal efferent arteriole also leads to an increased GFR by decreasing the pressure in the glomerular capillaries and conversely, constriction of the efferent arteriole can actually increase GFR by increasing glomerular capillary pressure.