Question

An organic condition that results in the progressive deterioration of brain cells

Answer 1

Alzheimer's is an organic condition that results in the progressive deterioration of brain cells. Other types of dementia are included in this category. 
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Answer 2

Answer:

The answer is Alzheimer's disease.

Explanation:

Alzheimer's disease is a progressive disease that affects memory and other important mental functions, because it is a neurodegenerative disease that manifests as cognitive impairment and behavioral disorders. Connections of brain cells and the cells themselves degenerate and die, which ultimately ends memory and other important mental functions. The main symptoms are memory loss and confusion.