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MEMBRANE POTENTIALRESTING MEMBRANE POTENTIAL in NEURONS CAN CHANGE = EXCITABLE cellsTYPICAL RESTING POTENTIAL of a NEURON =
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- The resting membrane potential depends on two factors that influence the magnitude and direction of Na+ and K+ diffusion across the plasma membrane. Identify these two factors.
- The _______ most directly affects the rate of information processing within the central nervous system.a. number of sodium channels along an axonb. number of potassium channels along an axonc. propagation speed of action potentialsd. threshold voltage of neuronse. ratio of sodium to potassium channels
- 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