BIOL130 Study Guide - Final Guide: Dynein, Tubulin, Phospholipid
Document Summary
Cell communication: cells integrate signals from many different pathways, signaling pathways, 1. Signaling molecule synthesized by signaling cell and released: 2. Signal molecule travels to target cell: 3. Signal molecule binds to receptor protein on or inside target cell: 4. A cell"s response to signal transduction can be fast or slow. Changes in protein activity (activation/inactivation) is fast or changes in gene expression is slow: 5. Both cause changes in cell shape, movement, metabolism, secretion, etc: long vs. short range communication, endocrine (short and long term) Sends hormone signal down blood stream to receptor on target cell: paracrine (short and long term) Most signals bind to receptors on the plasma membrane: small, hydrophobic signals will bind to intracellular receptors. Eg. cortisol, testosterone, thyroxine etc. similar to cholesterol in structure (steroid) Steroid receptors are members of the nuclear receptor family of transcription factors.