What is the term for the onset of the first menstrual cycle?

Sudden infant death syndrome (SIDS) is more likely to occur when

a. an infant is 12 months or older. c. babies are not kept sufficiently warm at night. b. the parents smoke. d. infants sleep on their backs.

Which of the following is an effect of depressants?

a. reduced anxiety, guilt, and tension b. increased energy c. increased inhibitions d. increased heart rate and respiratory rate