PSYC 271 Lecture 9: Chemical Communication
14 Dec 2015
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Answer w/in an 1 hr; half & half (25 mc 20 sa) Everything up to this lecture (everything but this lecture); stop at p. 85. Sodium floods in o: na+ channels close quickly (timed) & +"ve o o voltage makes k+ channels open. K+ channels close & sodium-potassium pumps return to normal. Gaps b/w 2 cells where chemical signals can be exchanged. Pre: anything from cell w/ action potential; the one releasing it; typically the axon. Neurotransmitter (nt): chemical used to signal b/w neurons. Vesicle: small membrane bubble where nt"s stored o. Vesicles don"t have to be let out from the terminal; can be released through varicosities. Receptor: protein that transmit info from extracellular space to inside of cell. Dendritic spines little spikes off of the dendrites; can vary in size & differentially shaped; it is dependent on the angle. The angle is impt o: dendrodendritic dendrites send messages to other dendrities o o o o.
