MCAT Social and Behavioral Sciences : Memory Disorders, Aging, and Forgetting

Study concepts, example questions & explanations for MCAT Social and Behavioral Sciences

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133 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Memory Disorders, Aging, And Forgetting

Dementia is a symptom associated with which of the following conditions?

Possible Answers:

Multiple sclerosis

Parkinson's disease

Cerebral vascular accident

Amyotrophic lateral sclerosis

Alzheimer's disease

Correct answer:

Alzheimer's disease

Explanation:

Alzhemier's disease is the most common form of dementia. Nerve cells in the area of the brain associated with memory and cognition are disrupted by plaques and tangles. The disease begins with mild memory loss and progresses to a point where the patient is unable to perform necessary everyday tasks.

Parkinson's disease is associated with abnormal movements, tremors, and a shuffling gait. The symptoms of Parkinson's disease are caused by a lack of the neurotransmitter dopamine, which is caused by a degeneration of neurons.

Multiple sclerosis is a chronic, progressive disorder caused by the body's immune system attacking the myelin sheathes surrounding nerve fibers in the brain, spinal cord, and optic nerves. This damage leads to muscle weakness, numbness, and vision loss.

Amyotrophic lateral sclerosis, or Lou Gehrig disease, occurs when motor neurons progressively deteriorate. This leads to muscle weakness that can progress to paralysis.

A stroke, also called a cerebral vascular accident, occurs when the blood supply to the brain is suddenly interrupted and brain cells are deprived of oxygen. The symptoms of a stroke include sudden onset of weakness, especially on one side of the body, trouble speaking, and vision disturbrances.

All MCAT Social and Behavioral Sciences Resources

133 Practice Tests Question of the Day Flashcards Learn by Concept
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