Multiple choice Which of the following is not a secretion of kidney? Calcitriol Antidiuretic Renin Erythropoietin Reveal answer Fill a bubble to check yourself B Correct answer Explanation Antidiuretic hormone is secreted from the posterior pituitary. Within hypothalamic neurons, the hormone is packaged in secretory vesicles with a carrier protein called neurophysin, and both are released upon hormone secretion.