Term
| The bilaminar embryonic disc is composed of which two layers? |
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Definition
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Term
| Implantation of the blastocyst occurs during which week? |
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Definition
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Term
| Which enzymes are involved in the implantation process? |
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Definition
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Term
| Which hormone is responsible for maintaining the endocrine activity of the corpus luteum in the ovary during pregnancy? |
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Definition
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Term
Which of the following structures does not develop at the 2nd week of development?
A) connecting stalk
B) amniotic cavity
C) amnion
D) embryonic tube |
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Definition
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Term
| When the blastocyst implants outside of the uterus it is considered a? |
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Definition
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Term
| Which hormone is produced by the syncytotrophoblast? |
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Definition
| Human chorionic gonadotropin hCG |
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Term
At the end of the second week what happens?
A) the primary chorionic villi are formed
B) heart begins to beat
C) the blood vessels begin to form
D) the head has developed |
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Definition
| A) the primary chorionic villi are formed |
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Term
| The blastocyst implants in the _____ body of the uterus? |
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Definition
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Term
Where does the blastocyst implant at the end of the first embryonic week?
A) normally in the endometrium
B) in the ampulla
C) usually superiorly in the body of the uterus
D) both A and C |
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Definition
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Term
| Implantation of the placenta that fully obscures the os of the uterus is called? |
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Definition
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Term
| Where does the prechondral plate form? |
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Definition
| future site of the mouth and head region |
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Term
| When does the implantation of the blastocyst begin? |
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Definition
| at the end of the first embryonic week |
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Term
| Implantation of the blastocyst normally occurs where? |
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Definition
| in the endometrium of the uterus |
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Term
| What is the term for a blastocyst that may implant outside the uterus? |
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Definition
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Term
| T or F: abdominal pregnancy may continue to full term and the fetus may be delivered, alive through an abdominal incision? |
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Definition
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Term
| At which day does the embryo fuse to form the lacunar network? |
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Definition
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Term
| How many layers does the embryonic disc contain? |
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Definition
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Term
| What type of cells are found in the hypoblast? |
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Definition
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Term
| What area is it where the endodermal cells are now columnar and form a thickened circular area? |
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Definition
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Term
| What embryonic layer does the neural tube originate from? |
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Definition
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Term
| What week does the neurulation process complete? |
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Definition
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Term
| What is the process by which the bi laminar disc turns into trilaminar disc? |
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Definition
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Term
| At the beginning of which week does a linear band of the epiblast appear? |
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Definition
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Term
| The primitive streak results from the _____ and _____ of cells of the epiblast? |
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Definition
| proliferation and migration |
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Term
Caudal to the primitive streak there is a circular hole that is called the what?
indicates the future site of the anus? |
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Definition
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Term
| Notochord serves as the bases for the development of ____? |
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Definition
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Term
| Allantois becomes the urachus, which is represented in adults by the? |
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Definition
| median umbilical logament |
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Term
| The neural plate invaginates along its central axis to form a median longitudinal neural groove on approximately what day? |
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Definition
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Term
| What week is neurulation completed? |
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Definition
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Term
| What mesoderm is continuous with the extra embryonic mesoderm that covers the amnion? |
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Definition
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Term
| The first pair of somites appears at the end of what week? |
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Definition
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Term
| The lateral endoderm is continuous with the ____ that covers the umbilical vehicle and amnion. |
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Definition
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Term
| Somites give rise to what? |
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Definition
| most of the axial skeleton |
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Term
What forms the body wall (somatopluere)
A) somatic mesoderm
B) amniotic endoderm
C) overlaying embryonic ectoderm
D) A and C
E) all the above |
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Definition
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Term
| During which month is the intraembryonic coelom divided into three body cavities, the pericardial, pleural and the peritoneal cavity? |
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Definition
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Term
| What week do blood vessels begin to form? |
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Definition
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Term
| From what kind of cells do heart and great vessels form from? |
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Definition
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Term
| When capillaries are visible in the villi, what are they called? |
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Definition
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