Sleep drugs such as Lunesta and Ambien help induce sleep because they ____.
a. restore circadian rhythm
b. relax the muscles
c. quiet the nervous system
d. reduce snoring
e. induce rapid eye movement
Question 2
Teenage girls are particularly vulnerable to HIV infection because an immature ____ is easily infected.
a. ovary
b. cervix
c. vulva
d. uterus
e. labia