Which of the Following Is a Sign of Aging in the Nervous

question 9

Multiple Choice

Which of the following is a sign of aging in the nervous system?

• A) Increased blood flow to the brain
• B) Shortened attention span
• C) Enlargement of the substantia nigra in the brain
• D) Increase in acetylcholine
• E) Improved thought processing

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Definitions:

Multiple Controls

In experimental research, refers to the use of two or more control groups to compare against the experimental group, enhancing the validity of the results.

Case-control Studies

Observational studies that compare individuals with a particular condition or disease (cases) to those without (controls) to identify risk factors.

Brain Tumors

Abnormal cell growths within the brain that can be benign (non-cancerous) or malignant (cancerous).

Case Series

A research study that tracks subjects with a known exposure or subjects who have undergone a particular treatment to document outcomes and patterns over time.