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Briefly define internal and external validity.
Alzheimer's Disease
A progressive neurodegenerative disorder characterized by memory loss, cognitive decline, and behavioral changes, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Organ Systems
Groups of organs that work together to perform complex functions necessary for life, such as the digestive or respiratory systems.
Pathology
The scientific study of diseases, focusing on their causes, effects, and nature.
Sleep-Wake Disorders
A group of conditions that affect the ability to sleep well on a regular basis, impacting daily functioning.
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