PSYC 2410 Chapter Notes - Chapter 5: Membrane Potential, Fluid Compartments, Sodium-Potassium Alloy
1 Aug 2013
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Glycolipids protective function, interact with receptors, recognition of self. Transmembrane proteins: signal proteins (folded, involved with communication) and channels (open or closed) Peripheral membrane proteins: either in extra or intracellular fluid attached on outside of cell membrane, facilitate chemical reactions (catalyst) Need 0mv to keep cl- where it is, need 20mv to keep k+ in and 120mv to keep na+ out. Active na/k pumps, 3 na out, 2 k in. Epsps: slightly depolarize the cell; increase the cell"s membrane potential and make it easier to elicit an action potential, due to opening of na channels. Ipsps: slightly hyperpolarize the cell, making the membrane potential more negative and make it harder to make an action potential, due to opening of k+ channels. Spatial summation psps from different synapses add up to one bigger psps (can be either more positive, more negative or cancel out. Temporal summation psps from same synapse in rapid succession, only positive or negative, cannot cancel out.
