BI110 Study Guide - Final Guide: Autocrine Signalling, Adrenergic Receptor, Paracrine Signalling
Document Summary
Hormones are chemical messengers that enable communication between cells in different parts of the body. A cell responds to a chemical signal that it secretes, often to amplify or maintain a physiological response. Involved in differentiation of t cells of the adaptive immune system. Chemical signaling molecule called local regulator- only acts a short distance from where it is secreted. Elicits responses in cells close to the signaling cell. Plays a key role in embryonic development because local regulators are used to mediate limb development (just in specific parts of the body). A hormone circulates in blood or hemolymph from the cell that secretes it to the target cell. Endocrine cells (present in tissue of various organs; stomach) are part of the endocrine system. Endocrine signaling permits communication between distant cells in animal. Regulates metabolism, salt balance, growth, and development and reproduction. Occurs at the junctions, or synapses, between a neuron and another cell.
