4. The Endocrine System

From the Stage 2 SACE Biology course outline, this video discusses: - The endocrine system releases hormones that are peptides, proteins, or steroids. - Hormones travel to target sites via the blood. - Hormones can alter the metabolism of target cells, tissues, or organs. • Compare the action of insulin and glucagon in blood sugar regulation. • Describe how diabetes mellitus can result from a hormonal imbalance. • Describe the action of thyroid stimulating hormone and thyroxine in metabolism. • Describe the role of antidiuretic hormone (ADH) on the nephron in osmoregulation. • Discuss the links between osmoregulation, blood volume, and blood pressure. - Hormonal responses are stimulated by either the nervous system or other hormonal messages. • Describe the role of adrenaline in the ‘fight or flight’ response. • Describe the role of thyroid-stimulating hormone in the production of thyroxin