Embryology Questions with correct answers
Zygote, 4-cell stage (2 days), Morula (3 days), Early blastocyst (4 days),
implanting blastocyst (6 days) Correct Answer-overview of fertilization
fertilization of ovum, zygote undergoes rapid cellular division,
formation of blastocyst (blastogenesis), implantation, differentiation of
trophoblast cells Correct Answer-overview of week 1
spermatozoa unites with oocyte, resulting in unicellular zygote Correct
Answer-fertilization
process of making cells different, or specializing tasks Correct Answer-
Differentiation
zygote undergoes mitosis, rapidly increasing number of cells called
BLASTOMERES Correct Answer-30 hours after fertilization
cell division has created 12-32 blastomeres and is now called MORULA
Correct Answer-3 days after fertilization
morula has entered uterus and has developed blastocystic cavity and is
now called BLASTOCYST Correct Answer-4 days after fertilization
the blastomeres within the blastocyst get separated into
TROPHOBLAST and EMBRYOBLAST Correct Answer-as
blastocystic cavity fills with fluid...
, gives rise to embryonic part of placenta Correct Answer-trophoblast
gives rise to embryo Correct Answer-embryoblast (inner cell mast)
blastocyst attaches to endometrial epithelium and trophoblast
(embryonic part of placenta) differentiates into CYTOTROPHOBLAST
AND SYNCYTIOTROPHOBLAST Correct Answer-6 days after
fertilization
inner layer surrounding blastocyst Correct Answer-cytotrophoblast
outer layer extending through endometrial epithelium and invades
deeper CT - produces enzymes that allows blastocyst to burrow into
endometrium - also produces human chorionic gonadotrophin Correct
Answer-syncytiotrophoblast
blastocyst is superficially implanted in the endometrium and hypoblast
appears on surface of embyoblast facing blastocystic cavity Correct
Answer-end of 1st week
completing of implantation, rapid differentiation of trophoblast,
formation of primary umbilical vesicle, amniotic cavity and bilaminar
embryonic disc Correct Answer-overview of week 2
Zygote, 4-cell stage (2 days), Morula (3 days), Early blastocyst (4 days),
implanting blastocyst (6 days) Correct Answer-overview of fertilization
fertilization of ovum, zygote undergoes rapid cellular division,
formation of blastocyst (blastogenesis), implantation, differentiation of
trophoblast cells Correct Answer-overview of week 1
spermatozoa unites with oocyte, resulting in unicellular zygote Correct
Answer-fertilization
process of making cells different, or specializing tasks Correct Answer-
Differentiation
zygote undergoes mitosis, rapidly increasing number of cells called
BLASTOMERES Correct Answer-30 hours after fertilization
cell division has created 12-32 blastomeres and is now called MORULA
Correct Answer-3 days after fertilization
morula has entered uterus and has developed blastocystic cavity and is
now called BLASTOCYST Correct Answer-4 days after fertilization
the blastomeres within the blastocyst get separated into
TROPHOBLAST and EMBRYOBLAST Correct Answer-as
blastocystic cavity fills with fluid...
, gives rise to embryonic part of placenta Correct Answer-trophoblast
gives rise to embryo Correct Answer-embryoblast (inner cell mast)
blastocyst attaches to endometrial epithelium and trophoblast
(embryonic part of placenta) differentiates into CYTOTROPHOBLAST
AND SYNCYTIOTROPHOBLAST Correct Answer-6 days after
fertilization
inner layer surrounding blastocyst Correct Answer-cytotrophoblast
outer layer extending through endometrial epithelium and invades
deeper CT - produces enzymes that allows blastocyst to burrow into
endometrium - also produces human chorionic gonadotrophin Correct
Answer-syncytiotrophoblast
blastocyst is superficially implanted in the endometrium and hypoblast
appears on surface of embyoblast facing blastocystic cavity Correct
Answer-end of 1st week
completing of implantation, rapid differentiation of trophoblast,
formation of primary umbilical vesicle, amniotic cavity and bilaminar
embryonic disc Correct Answer-overview of week 2
