The blood-brain barrier is made up of closely packed glial cells

According to the authors, which of the following statements is TRUE?

A) Gender differences in depression are found throughout all cultures. B) Gender differences in depression are not universal. C) Men are more likely than women to be diagnosed with depression. D) Men in the United States are more likely than women to be diagnosed with depression.

Paula is interested in finding out whether infants can distinguish between bitter and salty tastes. What would be the most effective way to investigate her question?

a. Ask adults when they first remembered eating something bitter and something salty. b. Repeatedly present one taste — either bitter or salty — and see whether infants habituate to it. c. Observe infants' facial expressions or head movements to see whether they respond differently to bitter and salty tastes. d. Use infants or toddlers who are old enough to answer questions about how things taste.