In Tubular Secretion, _______

Multiple Choice

In tubular secretion, _______.

A) certain substances are secreted into the filtrate
B) hydrogen ions are actively transported from the peritubular capillaries into the filtrate in the renal tubules
C) urine is secreted into the ureters
D) about 1200 g of salt are transported back into the blood during each 24-hour period