When a dog is sleeping and does not react to the sound of a person walking around the house, that is most likely an example of?

Dementia.

Explanation:

Dementia is a mental disorder with memory loss, problem-solving, etc. This problem is also found in canines. This disorder occurs due to depression, etc. The symptoms of dementia in canine includes lethargy, sleep disorders, forgetting learned behaviours, etc.

In the given case, the dog who does not react to the sound of a person walking around the house is most likely to suffer from dementia. Dementia causes a canine with the loss of interest in energy and ethusiasm, which is s sign of active canine.

Thus the correct answer is dementia.

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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