MEDN2001 Lecture Notes - Lecture 10: Growth Hormone–Releasing Hormone, Endocrine System, Releasing And Inhibiting Hormones
Document Summary
Difference between nervous and endocrine system -> the timescale. A variety of organs that secrete products (hormones) into the blood stream. Hormones regulate many different activities in the body. Slower and more prolonged than the nervous system, though still related. Tropic hormone stimulates production and growth of another gland. Releasing hormone (rh) stimulates release of a hormone by another endocrine gland. Inhibiting hormone (ih) inhibits release of a hormone by another endocrine gland. Don"t memorise - just the one he mentions. The endocrine system uses the hierarchical control feedback loop. Main hormone at the end can go bac and negatively regulate its own release. Hypothalamus connected to anterior pituitary by a network of capillaries known as the hypothalamic-hypophyseal portal system. Cell bodies of neurons are located in the hypothalamus, axons and axon terminals in posterior pituitary. Hp axis hormones and targets - anterior pituitary. Does not produce any hormones, only stores it. Hypothalamus secretes hormones to regulate the anterior pituitary.
