L-dopa's efficacy in the treatment of Parkinson's disease decreases after a few years of treatment because
a. as the patient gets older plasma concentrations may increase too fast and produce motor disturbances and adverse psychic effects
b. as the patient gets older plasma concentrations may fall too quickly, allowing the disease symptoms to suddenly appear
c. of continued progression of the underlying cause of the disease
d. all of the above
Question 2
In normal adult humans, alertness, decreased fatigue, improved ability to concentrate, and elevated mood are likely to be observed following administration of low doses of
a. amphetamine
b. cocaine
c. nicotine
d. all of these
Formation of disease-causing amyloid fibrils
Epidemiologists look for the causes of disease, such as toxic waste and industrial pollution, at the
Atmospheric pressure decreases with increase in altitude.
Pangaea 200 Million Years Ago
A pedigree for albinism collected in the early years of the twentieth century by Charles Davenport,
Morgellons disease