During middle adulthood, the number of rods and cones of the retina decline dramatically. By age 60, an individual has lost about ____ of their rods and cones

It is 1930 and you live in Vienna, Austria. You have recently developed the symptoms of psychosis and you are sent to physician Manfred Sakel. What treatment would he probably recommend?

a) electroconvulsive therapy b) insulin shock therapy c) deep brain stimulation d) the use of a combination of antipsychotic medication and a derivative of the opium poppy

According to recent surveys, approximately what percent of teenage couples use contraceptives the first time they have sex?

A) 20 B) 36 C) 75 D) 89