PSYB55H3 Chapter Notes - Chapter 2: Purkinje Cell, Endoplasmic Reticulum, Golgi Apparatus
Document Summary
Ion channels are prot"s w/ a pore thru their centers which allow certain ions to flow down their conc"n gradients. Ion pumps use ener to actively transp ions across the membr against their conc gradients (from regions of low conc to regions of high conc) The na+--k+ pump preserves the cell"s resting potent by maint"ng a larger conc of k+ inside the cell and na+ outside the cell. Ion pumps greater outside the cell, and k+ conc"s are greater inside the cell conc"s of ions ins compared w/ the outs of the cell? (the same q applies to other ions as well) proteins, known as ion pumps. If the depolarization is strong enough, meaning the membr moves from its resting potential of about -70 mv to a less neg value of. The presynaptic cell is located b4 the synapse wrt info flow; the postsynaptic cell is located after the synapse wrt info flow.
