Question

Given below is the diagrammatic representation of impulse conduction through an axon.Select the option with the incorrect information about impulse conduction at points A and B.1) An electric current flows on the inner surface from site A to B and on outer surface, from site B to
A to complete the circuit.2) Action potential generated at site A arrives at site B3) Permeability to $Na^{+}$decreases and quickly followed by a rise in permeability to $K^{+}$at site A. Polarity at the site B is reversed and hence called repolarised.4) $Na^{+}$ channels get closed and $K^{+}$channels get opened at site – A. Depolarisation and opening of $K^{+}$channels at site – B.​

Answer 1

Answer:

A neuron at rest is negatively charged because the inside of a cell is approximately 70 millivolts more negative than the outside (−70 mV); this number varies by neuron type and by species.