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MEMBRANE POTENTIALRESTING MEMBRANE POTENTIAL in NEURONS CAN CHANGE = EXCITABLE cellsTYPICAL RESTING POTENTIAL of a NEURON =
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- Action potentials are generateda. at most subthreshold voltages.b. only when the cell reaches threshold.c. only when the membrane potential exceeds threshold by 5 to 10 millivolts.d. intermittently, but usually when the membrane potential exceeds threshold.e. only after all of the sodium channels are open.
- MEMBRANE POTENTIALCHANGES IN PERMEABILITY = CHANGES in MEMBRANE POTENTIALThe membrane potential can pass from a ... statut to an .... statut
- Which of the following explains the unidirectional propagation of action potentials?a. The voltage dependence of the sodium channelsb. The voltage dependence of the potassium channelsc. The presence of a refractory period at a location where an action potential has just passedd. Sufficient "leakiness" of the axons, such that backward propagation of action potentials is preventede. The polarized orientation of microtubules within the axon