Which of the following is true regarding teratogens?
A)Teratogens cause anatomical defects after organogenesis is complete.
B)A fetus is most vulnurable to teratogens during the fetal period.
C)Practically every fetus is exposed to at least some teratogens.
D)Potential effects of most teratogens become apparent at birth.

Question

Quizplus · Accepted Answer

So many teratogens exist that practically every fetus is exposed to at least some of them.For this reason,it is difficult to determine which teratogen causes which problem.In general,the embryonic period is more vulnerable than the fetal period.After organogenesis is complete,teratogens can no longer cause anatomical defects.It may take a long time for the effects of a teratogen to show up.Only about half of all potential effects appear at birth.

Which of the Following Is True Regarding Teratogens