Which of the following layer is formed by trophoblast?
a) allotois
b) amnion
c) chorion
d) yolk sac
Explanation: chorion, also called Serosa, in reptiles, birds, and mammals, the outermost membrane around the embryo.
The extra embryonic membranes are formed during the ………weeks of development.
a) one to two
b) two to three
c) three to four
d) seven to eight
Explanation: these membranes are the amnion, yolk sac, allantois and chorion
Which of the following layer develops when cells of the epiblast fashion them into a transparent membranous sac?
a) allotois
b) amnion
c) chorion
d) yolk sac
Explanation: this sac becomes filled with amniotic fluid
Which of the following curves to form the tubular body and the amnion curves with it?
a) epiblasts
b) trophoblast
c) embryonic disc
d) all of these
Explanation: the sac extends all the way around the embryo, broken only by the umbilical cord
The developing embryo is protected against the physical trauma by……..
a) amniotic fluid
b) allontoic fluid
c) pericardial fluid
d) cerebrospinal fluid
Explanation: Amniotic fluid is the fluid that surrounds your baby during pregnancy. The amniotic fluid is mostly water that comes from your body.
Mature ovum in human beings is surrounded by………
a) plasma membrane
b) corona radiate
c) vitelline membrane
d) all of these
Explanation: The vitelline membrane or vitelline envelope is a structure surrounding the outer surface of the plasma membrane of an ovum
