physiological role of the placenta

Question 1

formed from ?

Answer 1

chorion (fetus) and endometrium (maternal)

Question 2

blood vessels of fetus and mother in what

Answer 2

close proximity (no blood mixing)

Question 3

functions

Answer 3

exchange site and secrete hormones

Question 4

exchange site

Answer 4

-gases, nutrients/wastes, hormones, antibodies (passive immunity)
-drugs e.g. alcohol, morphine, nicotine
-viruses e.g. measles polio

Question 5

secrete hormones

Answer 5

• estrogen + progesterone
  -hCG

Question 6

hCG

Answer 6

-maintains corpus luteum for ~6 weeks post-fertilization
-detected by pregnancy tests
-stimulates testosterone secretion by fetal testes