Multiple choice Which of the following hormones regulates water homeostasis throughout the body? Thyrocalcitonin Secretin Oxytocin Prolactin Insulin Reveal answer Fill a bubble to check yourself B Correct answer Explanation Secretin, a hormone produced in the S cells of the duodenum, regulates water homeostasis throughout the body, and influences the environment of the duodenum by regulating secretions in the stomach and pancreas.