Down syndrome is characterized by an extra chromosome on the ______ pair of chromosomes
a. 17th c. 21st
b. 19th d. 23rd
C
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In females, puberty is triggered by ________; in males, it is initiated by __________.
A. increases in estrogen levels; increases in testosterone levels B. decreases in testosterone levels; increases in testosterone levels C. increases in estrogen levels; decreases in estrogen levels D. increases in testosterone levels; increases in testosterone levels as well
The enzyme alcohol dehydrogenase breaks alcohol down into __________
a. acetate b. carbon dioxide and water c. disulfiram d. acetaldehyde
Which of the following suggests that mood disorders have a biological basis?
a. Children model parental attitudes of pessimism. b. Depressed children often get more attention than their siblings. c. Results from twin and adoption studies show a genetic component. d. Some people are more aggressive than others.
Which memory system has an unlimited capacity and can keep information for minutes or decades?
a. Short-term memory b. Long-term memory c. The sensory register d. Working memory