In treating erectile dysfunction, Alprostadil is
A) a drug that increases the level of nitric oxide in the penis.
B) an injection that relaxes the muscles surrounding blood vessels in the penis.
C) an inflatable type of penile implant.
D) a testosterone patch.
B
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How can a father's habits affect the health of an unborn child during prenatal development?
A. A father's nicotine intake produces DNA changes that are passed to the fetus on chromosome 23. B. A father's use of barbiturates interacts with a mother's use of marijuana, resulting in missing chromosomes on a child's 8th pair. C. A father's use of alcohol or illegal drugs can affect his sperm, which in turn may lead to chromosomal damage that affects the fetus. D. A father's use of crack cocaine causes sperm mutations, such that two sperm are capable of fertilizing a single ovum.
Erica is part of a research group that is studying a group of software executives. She is trying to determine the relationship between workplace stress and cancer. As part of the same study, she also advises her subjects on ways to counter workplace stress. Erica is most likely a__________
A) forensic psychologist B) personality psychologist C) health psychologist D) human factors psychologists E) Select
_____ is the extent to which the results of an experiment can be attributed to the manipulation of the independent variable rather than to some extraneous variable
a. Confounding b. Internal validity c. Regression to the mean d. External validity
Jimmy helps his father put away the dishes after dinner. Jimmy's father wants to increase the probability of this behavior and will be most successful by praising Jimmy
a. after all the dishes are put away. b. at bedtime. c. the next morning at breakfast. d. the next time that some dishes need to be put away.