Lesson completed.

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Your score was: 98 %

Question Results

Score 10 of 10

Question:

Potency embryonic cells

Response:

Up to which stage can totipotent embryonic stem cells be collected from the embryo?

AnswersYour AnswerCorrect
Early morula (8-cell stage)
Blastocyst
Late morula
Score 10 of 10

Question:

Developmental stages

Response:

Developmental stages

DropzoneCorrect AnswersYour answers
stage A pronuclei stage pronuclei stage
stage B 1st mitosis completed 1st mitosis completed
stage C 8-cell stage 8-cell stage
stage D early morula early morula
stage E blastocyst blastocyst
time 1 14-16 hours 14-16 hours
time 2 1,5 days 1,5 days
time 3 3 days 3 days
time 4 4 days 4 days
time 5 6 days 6 days
Score 10 of 10

Question:

Normal fertilization

Response:

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DropzoneCorrect AnswersYour answers
polar body polar bodies polar bodies
zona zona pellucida zona pellucida
pronuclei pronuclei pronuclei
Score 10 of 10

Question:

Fertilization went wrong

Response:

In the figure you see an oocyte containing three polar bodies. What went wrong and what will be the most probable consequence? Choose the two correct options:

AnswersYour AnswerCorrect
Triplet will develop – one from each “body”.
There is an asymmetric mitotic division of the zygote.
It will die because of a complete trisomy.
Oocyte is fertilized by two sperm cells.
The polar bodies remain in the same size as the oocyte itself.
One blastomere has undergone apoptosis.
Twins will develop and one “body” will die
Score 10 of 10

Question:

Developmental stages position

Response:

Which stage most probable reaches the uterus?

AnswersYour AnswerCorrect
B
D
C
A
Score 10 of 10

Question:

Early development

Response:

The first 4 stages shown in the figure hardly differ in size size. Between stages D and E, there is a very small increase in size. Explain the cause of this very small increase in size between stages E and D and why it is required.

AnswersYour AnswerCorrect
Fluid accumulates in the blastocyst cavity to nourish the trophoblast cells.
Blastomeres increase in size, otherwise they will decrease to a level below the minimally required size (critical size).
The trophoblast layer is thickened to resist the higher pressure in the last parts of the Fallopian tube.
Extracellular matrix will be incorporated between the outer morula cells to stabilize the tight junctions.
Water is pumped into the blastocyst cavity to increase pressure to prepare hatching of the blastocyst.
Score 10 of 10

Question:

ectopic pregnancy

Response:

Question : What may have happened to an embryo that caused its presence in the Fallopian tube at this late stage and resulted in an extra-uterine tubal pregnancy? Choose 3 correct options.

AnswersYour AnswerCorrect
Embryo already hatched in the Fallopian tube
Embryo developed too fast
Embryo migrated too slow
The embryo did not grow during the first 4 days
Embryo migrated too fast
The first 8 blastomeres have already grown too much
Score 10 of 10

Question:

Risc of ectopic pregnancy

Response:

It has been demonstrated that some factors increase the risk of an ectopic pregnancy (EP) in women: • Pelvic inflammatory disease: Previous infection of the pelvic region e.g. caused by chlamydia, can sometimes damage the Fallopian tubes. Chlamydia attributes to 30-50% of all ectopic pregnancies. • Prior pelvic or abdominal surgery: An embryo can implant in the scar tissue of the uterus lining, caused by a previous surgery • History of pelvic infections: Infection and inflammation can damage the lining of the tube and cause scarring that can prevent the embryo from passing to the uterus • Infertility: Women with infertility have a higher risk of ectopic pregnancy, possibly because tubal abnormalities are also a common cause of infertility. However, an ectopic tubal pregnancy only occurs when the pregnyncy results from a natural menstrual cycle but not an IVF cycle. Why do you think an ectopic tubal pregnancy only occurs in a natural cycle? 

AnswersYour AnswerCorrect
The oocyte does not develop until a Graffian follicle din an IVF cycle.
The early embryonic stages pass the Fallopian tube only in a natural cycle.
More then one embryo often is transferred in an IVF cycle
The embryo only develops adequately in a natural cycle.
Score 10 of 10

Question:

Different types of sections

Response:

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DropzoneCorrect AnswersYour answers
saggital saggital plane saggital plane
transverser transverse plane transverse plane
Score 7 of 10

Question:

Embryonic development assessment

Response:

In the training manual you find an overview on the characteristics of the different Carnegie stages. Which characteristics are used to judge the correct development of the embryo, when referring to the Carnegie stages. Three answers have to be chosen.

AnswersYour AnswerCorrect
looping of the heart tube
limb development
gut development
lower and upper jaw
position of the gonads
branching of the bronchial tree
thickness of the skin
number of fingers / toes
brain (neural tube) development
Score 10 of 10

Question:

Early stage of embryo implantation; early placenta

Response:

implantation very early placenta

DropzoneCorrect AnswersYour answers
gland endometrial gland endometrial gland
cytrotropho cytotrophoblast cytotrophoblast
syncytio syncytiotrophoblast syncytiotrophoblast
mat blood maternal blood vessel maternal blood vessel
lacunae lacunae lacunae
Score 10 of 10

Question:

embryonic/fetal nourishment

Response:

Drag the words into the correct boxes
During the first weeks, glandular secretion reaches the embryo via diffusion. Afterwards nourishment is provided by diffusion from the blood plasma via the wall of the placental villi. In the later stages the embryo is nourished by diffusion from the whole blood via the wall of the mature placental villi.
Score 10 of 10

Question:

Layer passage for nourishment

Response:

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DropzoneCorrect AnswersYour answers
syncytio basement membrane villus wall Syncytiotrophoblast
cyto endothelium feta blood vessel Cytotrophoblast
endothel endothelium feta blood vessel
BM mesenchyme of the villus basement membrane villus wall
mesen mesenchyme of the villus