Pituitary Like Hormones Of Placenta

Question 1

A protein hormone so-named because it has lactogenic properties in bioassays and
prolactin-like activity in radioreceptor assay.

Answer 1

Placental lactogen

Question 2

A protein has an amino acid
composition similar to ovine prolactin and ovine growth hormone.

Answer 2

Ovine placental lactogen (oPL)

Question 3

The binucleate trophoblastic cells migrate across the feto-maternal junction and
fuse to form a ?

Answer 3

syncytium

Question 4

highest concentrations between of oPL

Answer 4

120 and 140 days of gestation,

Question 5

It is used commonly in veterinary medicine to duplicate the
biological effects of LH and FSH.

Answer 5

Chorionic (i.e., placental) gonadotropins

Question 6

Human chorionic gonadotropin (hCG) for medical use is obtained from

Answer 6

urine of pregnant women

Question 7

The α subunit hCG is a single chain

Answer 7

92 amino acid

Question 8

β subunit consists of

Answer 8

145 amino acids.

Question 9

The placenta of the mare also produces a gonadotropin called

Answer 9

equine chorionic gonadotropin (eCG) or
pregnant mare serum gonadotropin (PMSG)

Question 10

They are
formed when trophoblastic cells from the chorion attach to the endometrial epithelium and
migrate into the endometrium.

Answer 10

The endometrial cups

Question 11

Is high FSH-like activity and is administered to cows to induce superovulation for embryo transfer

Answer 11

Equine CG

Question 12

Beside lactogens and gonadotropins, the placenta also produces peptides with

Answer 12

GnRH-, TRH-, GHRH-,
CRH-, and ACTH-like activities.

Question 13

Placental lactogens appear
to plays roles

Answer 13

regulating mammary gland function, fetal growth,
maternal intermediary metabolism, and
ovarian steroidogenesis.