Vasocongestion (engorgement of blood vessels) occurs during the ____________________ phase of the human sexual response cycle

Since 1996, neural-tube defects have decreased by over 25 percent in the United States and Canada. No decrease has occurred in Europe. What is the reason for the decrease in the United States and Canada?

Environmental changes in climate are responsible. Physicians routinely check for neural-tube defects at birth, thus causing the decrease. Cereals and breads in the United States and Canada are now fortified with folic acid. Europeans are genetically predisposed to neural-tube defects.

The use of red bracelets and the use of black dots on children's foreheads are cultural practices explicitly designed to:

a. enhance growth c. prevent sickness b. increase attractiveness d. ward off the evil eye