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WorksheetsВопросы по эмбриологии
Total questions: 41
Worksheet time: 14mins
Specify the duration of normal pregnancy in humans -
45 weeks
35 - 36 weeks
25 weeks
39-40 weeks
The embryo is represented by amniotic and yolk sacs, surrounded by the chorion, during
7 days
14 days
17 days
21 days
A rudiment, represented by cellular material that descends through Henson's node into the endoderm before the formation of elements of the middle germ layer, is called
neuroectoderm
axial mesoderm
prechordal plate
chord
The separation of the embryo's body from the temporary organs leads to the formation of
amniotic folds
axial mesoderm
internal folds
cytotrophoblast
Укажите сроки фетального периода в эмбриогенезе -
20 - 40 недель
9 - 40 недель
2 - 8 недель
первые две недели
Indicate what the embryonic period in human embryogenesis is called
first day
first week
2 - 8 weeks
first 15 weeks
A cavity has formed in the human embryo, and the differentiation of blastomeres is occurring. The blastomeres as a result of this differentiation in the second week of gestation - this is the appearance of
placenta
embryoblast
cyto- and syncytiotrophoblast
amniotic and yolk sacs
The most active development of all organs and systems of the body occurs
in the first week of development
up to 14 days
from 2 to 8 weeks
from 2 to 20 weeks
Indicate when the first phase of gastrulation occurs in the human embryo.
from 4 to 7 days
from 8 to 14 days
from 15 to 21 days
from 21 to 40 days
Select the first fetal organ that participates in hematopoiesis - it is
intestine
thymus
liver
bone marrow
The allantois performs functions in humans
a conduit through which blood vessels grow from the embryo's body to the placenta
respiration and excretion
endocrine secretion
formation of hematopoietic cells and gonoblasts
The composition of the umbilical cord includes all of the following components except
mucous connective tissue (Wharton's jelly)
two arteries and one vein
remnants of the yolk sac and allantois
two veins and one artery
Indicate what participates in the formation of the maternal part of the placenta?
basal part of the decidua
capsular part of the decidua
partial part of the decidua
myometrium
Division of the human egg
complete uniform synchronous
complete non-uniform asynchronous
incomplete uniform synchronous
incomplete non-uniform asynchronous
Indicate the normal location of a human embryo consisting of 3 blastomeres
implantation in the endometrium
attachment to the uterine wall
in the uterine cavity
in the cavity of the fallopian tube
The human embryo becomes bilayered during embryogenesis
by the end of the first week
by the end of the second week
by the end of the third week
by the end of the second month
On the upper, outer layer of the embryo, after the beginning of the second phase of gastrulation, there will be
intestinal endoderm and prechordal plate
mesenchyme and neuroectoderm
skin ectoderm and neuroectoderm
mesoderm and notochord
The embryonic physiological umbilical hernia disappears
by three weeks of intrauterine life
by three months of intrauterine life
by six months of intrauterine life
before the neonatal period
The formation of the human amnion begins with the formation of
amnionic folds
tubular folds
yolk sac
extraembryonic mesenchyme
The composition of the secondary villi of the chorion includes all the listed elements except
fetal blood vessels
maternal blood vessels
extraembryonic mesenchyme
cyto- and syncytiotrophoblast
The composition of the placental barrier in humans includes all of the above structures, except for
walls of the uterine hemocapillaries
walls of the villous hemocapillaries
connective tissue of the villi
syncytiotrophoblast and cytotrophoblast
people include all of the above structures except
walls of the uterine hemocapillaries
walls of the villous hemocapillaries
connective tissue of the villi
syncytiotrophoblast and cytotrophoblast
Indicate which of the following are the most critical periods in the development of the human embryo and fetus, except for
gastrulation
implantation
the time of laying each body system
late pregnancy
The human embryo consists of 8 blastomeres.
on day 1-2 of pregnancy
on day 3-4 of pregnancy
on day 7-8 of pregnancy
on day 10-14 of pregnancy
Indicate which blastomeres are the source of trophoblast development.
small dark
small light
large dark
large light
At the early stage of gastrulation, the cellular material of the epiblast moves predominantly by the type of
intussusception and epiboly
migration and delamination
invagination and delamination
migration and epiboly
From the second week of embryogenesis until birth, the normal development of the human embryo and fetus occurs
in the uterine cavity
in the functional layer of the endometrium
in the basal layer of the endometrium
in the myometrium
After the onset of the second, late stage of gastrulation, the following are found in the middle layer of the embryo
ectoderm and neuroectoderm
endoderm and mesenchyme
mesoderm and notochord
epiblast and hypoblast
What is the anatomical structure of the human placenta?
disk-shaped
temporary
cotyledonary
diffuse
The amnion, containing amniotic fluid, performs all functions in the embryo and fetus except for
providing nutrition and gas exchange for the fetus
preventing the fetus from adhering to surrounding tissues
allowing for movement
protecting the fetus in case of maternal shock or injury
What is the histological structure of the human placenta?
hemocorial
endotheliochorial
desmochoriotic
epitheliochorial
The placenta performs all of the following functions in the human fetus, except
exchange of substances between the blood of the mother and the fetus
hematopoietic
detoxification and protection
endocrine
The human egg cell is
acentral
telolecithal
primary isolecithal
secondary isolecithal
The trophoblast is a part of
epiblast
inner cell mass
hypoblast
blastocyst
Indicate the usual number of blastomeres at the time of implantation
3
8
56
more than 100
Embryo implantation into the uterine wall usually occurs at the age of
1-2 days
3-4 days
6-8 days
10-14 days
Implantation of a human embryo begins at the stage of
zygote
morula
blastocyst
gastrula
During the formation of the embryo's body in the second week of development, which structures will be involved?
the roof of the yolk sac and the roof of the amniotic sac
the bottom of the yolk sac and the roof of the amniotic sac
the bottom of the amniotic sac and the roof of the yolk sac
the bottom of the amniotic sac and the bottom of the yolk sac
Indicate whether the formation of a two-layered embryo from the cells of the epiblast occurs mainly by the following method
invagination
epiboly
migration
delamination
В нижнем, внутреннем слое эмбриона, после начала второй фазы гастрации, находятся
эндодерма и хорда
нотокорд и предхордальная пластинка
осевой мезодерма и эктодерма
эндодерма и предхордальная пластинка
Secondary chorionic villi include
cytotrophoblast and syncytiotrophoblast
trophoblast, extraembryonic mesenchyme, and fetal vessels
trophoblast, extraembryonic mesenchyme, and maternal vessels
allantois and amnion
