BIO* - Biology BIO* M121 Lecture Notes - Lecture 17: Vasopressin, Pituitary Gland, Endocrine System
9 Jun 2020
School
Department
Course
Professor
Document Summary
Hormones are produced and secreted by specialized cells or glands. They are carried between distant cells by blood or other body fluids. Neurotransmitters diffuse a short distance from a presynaptic cell to a. They bind to membrane receptors and result in a change in membrane potential. Neuroendocrine signals are considered hormones because they are carried by blood or other body fluids and act on distant cells. They do not act on or at the synapse. It acts on the collecting duct of the kidney and regulates excretion of water. Hormones can act via three different pathways: The endocrine pathway sends hormones directly from endocrine cells to effector cells. The neuroendocrine pathway releases neuroendocrine signals that act directly on effector cells. In the cns-to-endocrine pathway, neuroendocrine signals stimulate cells in the endocrine system, which respond by producing an endocrine signal that acts on effector cells. Hormones may act via three pathways and are regulated by negative feedback.
