What is the most important factor in determining what crosses the "placental barrier"?
a. The size of a molecule
b. The age of the fetus
c. The duration of the pregnancy
d. The age of the mother
a
Psychology
You might also like to view...
According to the text, what is the likely reason for the high rate of cesarean births in some parts of the world?
a. so that physicians can become wealthy b. to give surgeons practice c. to avoid a potential disaster during birth d. because vaginal deliveries are dangerous
Psychology
The forebrain is one of _______ operationally distinct sections of the brain
a. two b. three c. four d. five
Psychology