¿En qué medida al variar las cantidades de los elementos y sustancias químicas en los ciclos biogeoquímicos se producen alteraciones?

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.  

read more on -

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick