The
blastocyst is a fluid-filled hollow sphere composed of single layer of large,
flattened cells called…….and round cells called the inner cell mass
a) trophoblast
b) epiblast
c) hypoblast
d) mesoderm
Explanation: the inner cell mass located at one side of the morula
Which of the following cells begin to display L-section (adhesion) molecules on their surface soon after the blastocyst hatching?
a) epiblasts
b) trophoblast
c) inner cell mass
d) all of these
Explanation: the outer layer of cells of the blastocyst.
The adhesive protein on the surface of trophoblast cells which help in placenta is known as……….
a) P-section
b) L-section
c) immune globin
d) all of these
Which of the following cells take part in placenta formation and secrete and display several factors with immunosuppressive effects?
a) epiblasts
b) trophoblast
c) inner cell mass
d) all of these
Explanation: protect the developing embryo from attack by the mother’s cells
Which of the following becomes the embryonic disc which forms the embryo proper?
a) epiblasts
b) trophoblast
c) inner cell mass
d) all of these
The
extra embryonic membranes are formed by…….
a) epiblasts
b) trophoblast
c) inner cell mass
d) all of these
Explanation: except the chorion which is formed by trophoblast
