What Is the Main Reason That People Who Test Positive

question 13

Multiple Choice

What is the main reason that people who test positive for the genes associated with Alzheimer's disease do not always develop the disease?

• A) Psychological and biological stressors interact with physiological processes to produce Alzheimer's disease.
• B) The screening tests are often inaccurate.
• C) Some forms of the disease are subclinical, in that they never manifest themselves in overt behaviour.
• D) We still know so little about the brain processes involved.

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Definitions:

Sensory Neurons

Nerve cells that transmit sensory information (e.g., touch, pain, visual, sound) from the body to the central nervous system.

Motor Neurons

Nerve cells that initiate and conduct impulses from the central nervous system to muscles or glands, inducing action.

Action Potentials

The brief electrical impulses that serve as the fundamental signals by which neurons send information over long distances within the nervous system.

Serotonin Neurons

Neurons that produce and release serotonin, a neurotransmitter important for mood regulation, appetite, and sleep.