What has research shown concerning the possible causes of Alzheimer's disease?
What will be an ideal response?
On autopsy, the brains of persons with Alzheimer's disease show two distinctive characteristics: tangled clumps of nerve cells and patches of nerve-cell branches called plaques. The neurotransmitter, acetylcholine, is involved in learning and memory. Patients with Alzheimer's disease have dramatic reductions in the amount of acetylcholine produced in the brain. A strong correlation exists between the amount of loss of acetylcholine in the brain and the severity of dementia. The genetic basis for many cases of early-onset familial Alzheimer's disease is now established. Some studies have linked Alzheimer's disease to abnormalities on chromosome 21, which has been identified as the location for the gene for a protein called beta amyloid, which is found in the characteristic clumps and plaques of this disease. However, it is not clear if beta amyloid is the cause or the result of brain cell degeneration. The degeneration may be due to the protein called apolipoprotein E (Apo E). A high percentage of Alzheimer's patients have at least one gene coding for this type of Apo E protein known as E4.
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Gregory's college roommate finds him very difficult to live with because Gregory is extremely selfish and demands immediate gratification of all his needs and desires. From a psychodynamic point of view, Gregory is still being controlled by the:
A. id B. ego C. superego D. conscience
You are at a parade where there are a number of marching bands. You perceive the bands that are all in the same uniforms as being grouped together. The red uniforms are one band, the green uniforms another, and so forth. You have this perceptual experience because of the law of
A. simplicity. B. similarity. C. pragnanz. D. familiarity.
Dr. Wong is doing a psychophysical experiment to determine the smallest detectable concentration of coffee. He presents some coffee concentrations that are clearly detectable, others that cannot be detected, and some that are just detectable. These presentations are randomized. What method is Dr. Wong using?
A. adjudication B. constant stimuli C. inverse thresholds D. limits
Isaac belonged to the “brains” in his school, not the “jocks.” These are examples of
a. cliques. b. deviancy training. c. close friendships. d. crowds.