Answer :
Final answer:
Alzheimer's disease is a degenerative brain disease, not merely caused by aging but also influenced by genetic, lifestyle, and environmental factors. It is characterized by memory loss, cognitive decline, and progressive impairment in daily functioning. Therefore, the correct option is 2.
Explanation:
Understanding Alzheimer's Disease
Alzheimer's disease (AD) is a degenerative brain disease and the most common cause of dementia in older adults. Contrary to being solely caused by aging, it is a progressive disorder characterized by the decline in cognitive function, memory loss, and eventually the loss of ability to perform simple tasks. It is a neurodegenerative disorder marked by beta-amyloid plaques, neurofibrillary tangles, and neuroinflammation, which result in progressive cognitive impairment.
Age is a significant risk factor for Alzheimer's, with the likelihood of developing the disease doubling approximately every five years after the age of 65. However, AD is not a natural part of aging, and factors such as genetics, lifestyle, and environment play a role in its onset and progression. While currently, there is no cure for Alzheimer's, treatments focus on managing symptoms and slowing the progression of the disease.
