Hallucinogens work by disrupting the nerve cells that influence the transmission of serotonin

The male and female sexual responses differ in that

a. a man's blood pressure drops during orgasm whereas at the same time blood pressure rises in women. b. the maximum level of arousal is reached in the excitement phase for men and during the plateau phase in women. c. women are more likely to enter a refractory period following orgasm. d. women are more capable of experiencing multiple orgasms in fairly rapid succession.

Higher rates of violent crime in the United States than in other Western countries appear to be due in part to

a. more expensive automobiles. b. more conservative religious beliefs. c. higher rates of poverty. d. stricter gun control.