PSB-2000 Lecture Notes - Vagus Nerve, Negative Feedback, Hypothalamus
Document Summary
Widespread, released into blood vessels and travel throughout the entire body and when they come across a cell with a receptor, they will react to it. Endocrine cell, makes and releases hormones into the blood. Target cell, has the receptor and if affected. Released from a terminal to affect one cell or released into the blood to have a more widespread effect. Generally in metabatropic receptors, the lygand or hormone binds to the receptor which initiates event inside the cell. Come from the gonads, testes and ovaries or adrenal cortex. Lipid molecules and can go through the membrane of the target cells and can act on receptors within the cell or even within the nucleus of a cell. Can go to the nucleus and affect gene transcription. Hypothalamus and pituitary gland, hypothalamus controls hormone release by pituitary gland. Hypothalamus makes releasing hormones which are sent to the pituitary and then the ant. pituitary releases hormones.
