A. Atrial natriuretic factor is associated with III. Lowering the blood pressure.
B. Erythropoietin is related to IV. Stimulates the formation of RBC.
C. Gastrin corresponds to I. Stimulates the secretion of HCl.
D. Cholecystokinin is associated with II. Stimulates the pancreas to secrete digestive enzymes. Final Answer:
A-III, B-IV, C-I, D-II