People under high stress are more likely to get sick because stress inhibits:

Brightness of light is measured in units called foot candles. A designer of store displays is working on a project for a large retailer They tell her to keep electrical costs low because the store is open for many hours and the displays are large. After arriving at a brightness level that yields positive responses, she uses her knowledge of psychophysics to reduce the brightness enough to save money, but not enough that store patrons notice. If the current level of brightness is 600 foot candles, which of these is the greatest reduction she can achieve without patrons noticing the difference?

a) 10 foot candles b) 24 foot candles c) 45 foot candles d) 72 foot candles

Biological and environmental challenges shared by adolescents in all times and in all cultures are examples of

A) age-graded influences. B) sociocultural-graded influences. C) nonnormative life events. D) history-graded influences.