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Unformatted text preview: potassium ions will not be transported-Generation of Postsynaptic Potentials a) Neurotransmitters affect postsynaptic cells by 1) Affecting ion-channel proteins 2) Altering the permeability of cells 3) Causing molecular changes in the cells 4) Initiating signal transduction pathway in the cells b) At the postsynaptic cell, there are two different types of potentials 1) Excitatory Postsynatpic Potentials (EPSPs) Makes the membrane potential positive so that it can reach to the threshold and makes positive Permeable for potassium and calcium ions 2) Inhibitory Postsynatpic Potentials (IPSPs) Makes the membrane potential negative so that it can go back to the refractory period and makes inside Permeable for chloride and sodium ions -Why is the signaling in neurons only one certain direction? a) The generation of electrical signal from axon hillock b) The activation of sodium channels right after inactivation of potassium channels...
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- Fall '11