Malfunctions of the mitochondria can cause a number of disorders. which statement
best explains how mitochondrial problems can affect an organism?

As no statements are provided, lets have a look at the mitochondria and its problems generally.

Explanation:

Mitochondria can be described as an organelle of the cell which is involved in cellular respiration. Mitochondria convert sugar and oxygen into carbon dioxide and water with the release of ATP. Hence, it is an important organelle and powerhouse of a cell.

Problems in the mitochondria will cause cellular respiration to not occur properly. As a result, cells will not receive enough ATP to carry out their normal functions. Hence, problems in mitochondria can cause serious effects in a person.

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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