When driving your car, you hear a squeal every time you press the brakes. you decide the problem is that there's a mouse trapped in the brakes. this is an example of a

The Correct Answer is "Hypothesis"

Explanation:

A Hypothesis is something that is assumed to be true just for the sake of arguments but there is no fact that the argument you stated is correct or not because it is a Hypothesis a kind of assumption just to support your argument.

In Hypothesis the known facts are often ignored to provide the further material for discussion.

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; endoplasmic reticulum;