2. Aim: What are the main parts and functions of the endocrine system? I. Endocrine System A. Endocrine (ductless) gland - is a group of cells that produces and secretes chemicals. A gland selects and removes materials from the blood, processes them, and secretes the finished chemical product for use somewhere in the body.

4. ** Exocrine gland – a gland that has a duct and releases it secretions directly to where they have to go. Ex: pancreatic duct and bile duct. DUCTS

5. B. Hormone - is a chemical messenger from one cell to another. C. Target Cell – specific cell that a specific hormone stimulates. 1.A target cell may do one of the following when stimulated by a hormone: a.Secrete more of its product b.Stop secreting its product

6. II. Main endocrine glands A. Hypothalamus – links the nervous system to the endocrine system. Releases hormones that go to the pituitary gland and tells the pituitary what hormones to secrete.Hypothalamus B. Pituitary Gland “Master Gland” – produces hormones that affect many other endocrine glands.Pituitary Gland 1. Has two lobes (anterior and posterior) that release their own hormones.

7. 2. Hormones of the pituitary a. Growth hormone (GH) – controls growth by promoting growth of bone and muscle. Robert Wadlow

8. b. Thyroid stimulating hormone (TSH) – stimulates thyroid gland to release thyroxin. c. Follicle stimulating hormone (FSH) – stimulates the follicles in females to develop egg.

9. C. Thyroid Gland – releases thyroxin which controls rate of metabolism. Results from having insufficient iodine in diet.

10. D. Islets of Langerhans – found in the pancreas. Release hormones insulin and glucagon. 1.Insulin – lowers blood sugar level 2.Glucagon – raises blood sugar level.

11. E. Adrenal Glands – located on top of kidneys. Secrete hormones adrenaline (epinephrine) and noradrenaline (norepinephrine).

12. 1. Adrenaline is the “fight or flight” hormone. F. Gonads – testes and ovaries. 1. Testes – secrete hormone testosterone that is responsible for secondary sex characteristics. 2. Ovaries – secrete hormones estrogen and progesterone. These hormones are responsible for secondary sex characteristics and the menstrual cycle.