Relaciona las vias de entrada a nuestro organismo de los microorganismos patogenos con las barreras que el sistema inmunitario tiene como primer mecanismo de defensa

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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answer; a male inherits only one allele of the x-linked gene controlling hair color;

answer; i believe the correct answer to the above question is ( friction)

a community that experiences major changes undergoes progress