Compared to other ethnic groups in the United States, the suicide rate is about four times higher among ______
a. male African American adolescents and young adults
b. female Hispanic American adolescents
c. elderly Caucasian males
d. Native American adolescents and young adults
D
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The theory that explains addiction as a process that first alters brain organization and function and then leads to behaviors related to motivation and reward is known as which of the following?
a. gateway b. incentive-sensitization c. hedonic d. organic-disinhibition
Which type of leukocyte matures in the bone marrow and produces antibodies to attack specific targets?
a. B cells b. Y cells c. T cells d. natural killer cells
Echolocation, used by some animals to navigate and find prey, relies on the ability of physical objects to _________ sound
a. absorb b. refract c. reflect d. enhance
Birth control pills must be taken every day at approximately the same time because ____
a. establishing a routine means less chance of forgetting to take the pill b. ovulation may occur due to declining hormone levels c. one may forget where they are in the pill pack d. they have a long half life