Down syndrome occurs when a particular gene is injured on the X chromosome

Paula is unable to sleep because she is having frequent and bothersome night sweats resulting from menopause. If she decides to take medicine to help with this symptom, the medicine her physician would most likely prescribe would be:

a. aspirin taken together with caffeine b. a male hormone similar to testosterone c. a multi-vitamin that includes a large dose of calcium d. estrogen, progesterone, or a combination of these drugs

Modern theories of drug addiction suggest that addicts relapse after lengthy drug-free periods because of the effects of

A) stress. B) drug priming. C) exposure to cues related to drug effects by Pavlovian conditioning. D) all of the above E) none of the above