Final answer:
The statement is false. Angiotensin, insulin-like growth factor 1, and CRH are not primarily glucose counter-regulatory hormones. The primary hormones involved in glucose counter-regulation are glucagon and cortisol, among others.
Step-by-step explanation:
False. The statement that the other glucose counter-regulatory hormones are angiotensin, insulin-like growth factor 1, and CRH is not correct. While insulin-like growth factor 1 (IGF-1) may have some effects on glucose metabolism, it is not primarily known as a glucose counter-regulatory hormone. Angiotensin is more involved in blood pressure regulation, and corticotropin-releasing hormone (CRH) is primarily involved in the stress response. The main hormones involved in glucose counter-regulation are glucagon, cortisol, epinephrine (adrenaline), and growth hormone. These hormones work in opposition to insulin, which lowers blood glucose levels. Glucagon, released from the pancreas, raises blood glucose levels by stimulating glycogenolysis (the breakdown of glycogen to glucose) and gluconeogenesis. Cortisol, a glucocorticoid, also raises blood glucose levels through gluconeogenesis and antagonizing insulin's effects.
For further clarification: Vasopressin, also known as antidiuretic hormone (ADH), is synthesized by the hypothalamus and released from the posterior pituitary gland; it is not directly involved in blood glucose regulation. Also, most hormones, including prolactin, are indeed regulated by negative feedback loops. Hormones such as insulin and glucagon play a vital role in maintaining glucose homeostasis, with insulin released in response to high blood glucose levels and glucagon in response to low levels.