Which of the following solar phenomena is likely to have the most negative impact on earth? a solar flare as it may cause brief radio blackouts an aurora as it may damage communication networks an aurora as it may cause worldwide transmission problems a solar flare as it may harm satellites and aircrafts flying near poles

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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"d.) carbon dioxide and hydrogen sulfide"