BIO SCI 93 Lecture Notes - Lecture 9: Paracrine Signalling, Plasmodesma, Cell Membrane

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 93
• Professor: Busciglio/ Wood/ Green

Document Summary

Lecture 9: bio 93 four main signals local signaling. Synaptic cleft = space between axon and target cell. Secreted signals that act at distant sites. Animal travel in vessels, cell to cell, or diffusion in air. Plant tales through gap junctions travels through plasmodesmata between plant cells. Ex white blood cell/bacteria receptors bind to antibodies located on surface of bacteria (antibodies attach to bacteria) Once receptor on wbc finds anti body it triggers phagocytosis. Begins the change is shape or location of the receptor receptors: G protein coupled receptor (gpcr) tyrosine kinase receptors ligands are usually growth factors. Kinases are enzymes that catalyze transfer of phosphate groups ligand- gated ion channels ligand gated, once ligand has attached to receptor, opens gate to allow inflow/outflow of particles. Some gated ion channels are activated by electrical signals: voltage gated ion channels. Gene expression regulation receptor in cytosol or nucleus.