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The channels that provide for the movement of potassium in the resting neuron are__________.
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- Which of the following statements about the spread of electrical signals/currents along an axon is false?a. The spread of a passive signal is limited by the leakage of current out of the axon.b. The time course of passive signal spread slows with increasing leakiness of the axon.c. The membrane length constant describes how far an action potential can propagate along an axon.d. Action potentials can propagate for long distances without decrement.e. Action potential propagation requires both current flow along the axon and ion fluxes across the axon membrane.
- Which of the following statements on either the rising or overshoot phase of the action potential is false?a. The time from threshold to maximum depolarization is essentially instantaneous (i.e., too fast to be measured accurately with current electronics).b. A positive feedback loop leads to a regenerative depolarization that would increase continuously if unchecked.c. The degree of depolarization is limited in part by the declining driving force on sodium entry.e. The degree of depolarization is limited in part by the inactivation time course for the sodium current.e. The degree of depolarization is limited in part by the activation time course of the potassium current.
- The mode of action potential propagation along myelinated axons is calleda. salutatory.b. scleorid.c. oligodendroid.d. ranvierian.e. hyperian.