En el paso 5 del ciclo de Krebs, la succinil CoA reacciona con la enzima: a)- Succinato Hidrogenasa b)Isocitrato Hidrogenasa c)- Succinil CoA sintetasa
d)- malato.

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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i believe the answer would be b. hope it : )

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.