Amino acid-based hormones include amines thyroxine and protein hormones. Positive feedback mechanisms B. How Feedback Mechanism Regulate The Hormone Secretion Quora A the levels of glucagon and insulin are based on a positive feedback system. . Nerve control a all the above. A The levels of glucagon and insulin are based on positive feedback system b Hyperglycemia stimulates release of glucagon c Insulin increases glycogenesis and lipogenesis d Glucagon stimulates kidney cells to release glucose into the blood e Blood amino acid level is the most important regulator of insulin and glucagon. In this way the concentration of hormones in blood is maintained within a narrow range. Amino acid-based hormones are most common. During childbirth a positive feedback loop regulates its secretion. During positive feedback the outcome of a process feeds back to the system and stimulates the process to continue. The inc...