In the absence of testosterone during development, we would all be born anatomically as girls

When a drug’s margin of safety is very narrow, it is safe to say that ____

a. ?the drug is very safe in many different doses b. ?the drug is a psychoactive drug c. ?the person has developed a high degree of tolerance for the drug d. ?withdrawal symptoms have become very extreme

According to your textbook, the most common cause of dementia is

a. repeated strokes. b. the interaction of medications. c. Alzheimer's disease. d. the general shrinkage and atrophy of the brain.