Parkinson's symptoms appear when ______ of the nerve cells in the substantia nigra are damaged.

A. 25%
B. at least 50%
C. at least 75%
D. 100%


Answer: B

Psychology

You might also like to view...

Robert Sternberg's triarchic theory has the advantage of:

A. giving credit to people for abilities that are not normally measured by standard tests of intelligence B. explaining differences in intelligence between people C. stressing affective factors D. identifying parts of the brain that are involved in critical thinking

Psychology

Gabrielle and her therapist are currently working to improve Gabrielle's social skills and correct her faulty ways of thinking. Which common factor of therapy is highlighted here?

a. the therapeutic alliance b. the achievement of insight c. the release of emotions d. the building of competence/mastery

Psychology

The percentage of marriages that are remarriages for at least one partner is ______

Fill in the blank with correct word

Psychology

Parents may successfully shape a complex behavior in their child, such as tying shoelaces

or riding a bicycle. However, the eventual and more efficient form of the behavior will be the result, not of parental shaping, but shaping by a. natural selection. b. expert models. c. natural contingencies. d. successive approximations. e. punishers rather than reinforcers.

Psychology