The afferent arteriole in a nephron dilates. What happens to resistance in the afferent arteriole and GFR in that nephron?
a) Afferent arteriole resistance increases; GFR decreases
b) Afferent arteriole resistance increases; GFR increases
c) Afferent arteriole resistance decreases; GFR decreases
d) Afferent arteriole resistance decreases; GFR increases