Explain how graded potentials and action potentials are different. On which part of a neuron would you expect a graded potential to occur? An action potential? Explain what an EPSP and IPSP are? How would you generate an IPSP?
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Graded potentials are small changes in the membrane potential of a neuron that can either depolarize (make more positive) or hyperpolarize (make more negative) the neuron. These changes are usually caused by the opening or closing of ion channels in response to a Show more…
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Describe the difference between an action potential and a graded potential (e.g., excitatory and inhibitory post-synaptic potentials). Where in the nervous systems do graded potentials occur?
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How does an action potential differ from a graded potential? Graded potentials have a constant amplitude. Action potentials rely on sodium ions only; graded potentials rely on sodium and potassium ions. Action potentials have a constant amplitude. Graded potentials are able to travel long distances, while action potentials are limited to very local effects within a cell. Graded potentials are carried on the axon, while axon potentials are carried on the dendrites.
Please outline the process of action potentials in neurons starting with what causes the initial depolarization, what's happening to voltage-gated Na+ and K+ at each phase of the action potential as in depolarization, repolarization, and hyper-polarization.
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