Final answer:
The function of the neuronal cells in the minor calyx of the kidney is secretion.
Step-by-step explanation:
The function of the neuronal cells in the minor calyx of the kidney is secretion. In the process of urine formation, filtration occurs in the renal corpuscle, reabsorption occurs in the proximal tubule, and secretion occurs in the distal tubule. The minor calyx is part of the collecting duct system, where neural cells are involved in the secretion of certain substances into the urine.