Which of the following statements about the spread of electrical signals/currents along an axon is false?

Which of the following statements about the spread of electrical signals/currents along an axon is false?

Which of the following statements about the spread of electrical signals/currents along an axon is false?



  1. The spread of a passive signal is limited by the leakage of current out of the axon.
  2. The time course of passive signal spread slows with increasing leakiness of the axon.
  3. The membrane length constant describes how far an action potential can propagate along an axon.
  4. Action potentials can propagate for long distances without decrement.
  5. Action potential propagation requires both current flow along the axon and ion fluxes across the axon membrane.

Answer: 3