Thanks, Marc. The site is very helpful and I'm feeling less frustrated. Carol
Carol DeVolder, Ph.D. Professor of Psychology Chair, Department of Psychology St. Ambrose University Davenport, Iowa 52803 phone: 563-333-6482 e-mail: [EMAIL PROTECTED] -----Original Message----- From: Marc Carter [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 09, 2007 4:00 PM To: Teaching in the Psychological Sciences (TIPS) Subject: RE: [tips] Sensation and Perception people--help please I'm rushing and have to leave, and I cannot say off the top of my head what are the conditions under which each does what it does, but my recollection is that they are two distinct types of bipolars. I think the bipolars representing on-center connections are depolarizing (invaginating) bipolars and off-center connections are made with hyperpolarizing (basal junction) bipolars. Whether glutamate causes the cell to hyper- or depolarize is a function of the kind of cell. Try here <http://webvision.med.utah.edu/OPL2.html#horizontal> for an explanation. It's at the bottom of the page, and seems pretty sound, to me. m ------ "There is no power for change greater than a community discovering what it cares about." -- Margaret Wheatley ---
