PSYCH 330 Lecture Notes - Resting Potential, Axon Hillock, Microsoft Powerpoint
14 Oct 2013
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*potassium and chloride channels are leak channels so they are open at all times allowing ions to go in and out freely. What happens to the resting membrane potential if you Force of diffusion pushes more cl- into the cell. >> little to no effect because the ion channels are closed! >> but if you increase it enough it may hyperpolarize. >> the force of diffusion usually pushes potassium out but now the concentration gradient due to increase of potassium is reduced so more potassium can stay in the cell. > leak channels are located everywhere across the neuron. > chemically-gated channels near the soma and dendrites. >> stay open as long as the transmitter is attached. >> has a binding site where neurotransmitters attach. During attachment, the site changes shape allowing ions to move through. >> causes small local changes in memory potential called post-synaptic potentials (psp). they occur on dendrites and the cell body.
