HK 2810 Study Guide - Final Guide: Autocrine Signalling, Sertoli Cell, Vasoactivity

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Signiicance: physiological mechanism to overcome homeostaic condiions by amplifying a signal to cause dramaic change. Once +fb begins, an event will simulate preceding events that will cycle back and amplify the original event. This will increasingly repeat unil a inal result has been achieved. The body returns to homeostaic condiions via negaive feedback: long-term poteniaion: ap from presynapic cell open voltage-gated ca2+ channels. Glutamate vesicles fuse membrane bind ampa, nmda, and metabolic rc on post- synapic cell internal calcium recruits more ampa rc on post-synapic membrane to. Ampliied unil uterine contracions are great enough to delivery baby (no more stretch +fb shut of: negaive feedback. Signiicance: control mechanism designed to maintain nearly constant condiions. Nacl in md, sensed by the chemo rc renin local aii vd ef>af gfr: cell asymmetry. Signiicance: cells can be asymmetrical in their distribuion of transporters, channels, and other characterisics.