Along with gas exchange and nutrient transfer,the placenta produces many hormones necessary for normal pregnancy.These include: (Select all that apply.)
A) human chorionic gonadotropin (hCG).
B) insulin.
C) estrogen.
D) progesterone.
E) testosterone.

Question

Quizplus · Accepted Answer

hCG causes the corpus luteum to persist and produce the necessary estrogens and progesterone for the first 6 to 8 weeks.Estrogens cause enlargement of the woman's uterus and breasts; cause growth of the ductal system in the breasts; and,as term approaches,play a role in the initiation of labor.Progesterone causes the endometrium to change,providing early nourishment.Progesterone also protects against spontaneous abortion by suppressing maternal reactions to fetal antigens and reduces unnecessary uterine contractions.Other hormones produced by the placenta include hCT,hCA,and numerous growth factors.Human placental lactogen promotes normal nutrition and growth of the fetus and maternal breast development for lactation.This hormone decreases maternal insulin sensitivity and utilization of glucose,making more glucose available for fetal growth.If a Y chromosome is present in the male fetus,hCG causes the fetal testes to secrete testosterone necessary for the normal development of male reproductive structures.

Along with Gas Exchange and Nutrient Transfer,the Placenta Produces Many