Talk:2010 BGD Practical 3 - Quiz: Difference between revisions

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+ the blastocyst has an embryoblast and trophoectoderm layer
+ the blastocyst has an embryoblast and trophoectoderm layer


||The blastocyst has an embryoblast, also called an inner cell mass, and a trophoectoderm or trophoblast  layer. The 2 blastomere stage develops into the morula and at the formation of the blastocoel is then the blastocyst. The cavity lined by endoderm is the yolk sac and occurs after the blastocyst stage. The blastocyst stage occurs both before and after after hatching from the zona pellucida.
||The blastocyst has an [[E#embryoblast|embryoblast]], also called an inner cell mass, and a [[T#trophoectoderm|trophoectoderm]] or trophoblast  layer. The 2 blastomere stage develops into the morula and at the formation of the blastocoel is then the blastocyst. The cavity lined by endoderm is the yolk sac and occurs after the blastocyst stage. The blastocyst stage occurs both before and after after hatching from the zona pellucida.
 
 
{The process of implantation
|type="()"}
- is driven by the trophoblast layer
- occurs following adplantation
- can occur inside and outside the uterine body
- allows endocrine support of the corpus luteum
+ all of the above





Revision as of 17:43, 15 May 2010

Take the Quiz

  

1 Which of the following statements is most correct concerning early development in female gametogenesis:

the total number of ooctyes is regulated by follicle stimulating hormone
oocyte numbers increase prenatally and begin to decrease at puberty
less than 0.1% of all oocytes formed are released during reproductive life
oocytes within all antral follicles are released in sequence at ovulation
oocyte selection occurs at the primordial follicle stage

2 The spermatogenic epithelium is stimulated by follicle stimulating hormone (FSH)

true
false

3 Gamete differentiation occurs while diploid

oocytes
spermatozoa

4 Which of the following is incorrect about the block to polyspermy

occurs after fertilization
occurs when meiosis II is completed
occurs initially when sperm and oocyte membranes fuse
occurs when cortical granules are released

5 Which of the following statements about the blastocyst is most correct

the blastocyst forms from the 2 blastomere stage
the blastocyst has a cavity lined with endoderm
the blastocyst stage occurs after hatching from the zona pellucida
the blastocyst has an embryoblast and trophoectoderm layer

6 The process of implantation

is driven by the trophoblast layer
occurs following adplantation
can occur inside and outside the uterine body
allows endocrine support of the corpus luteum
all of the above

7 Ectoderm refers only to the neural plate region of the trilaminar embryo

true
false


oocyte numbers development follicles sperm development fertilization events embryo cell division implantation events/signaling early embryo layers early placenta gastrulation/axial process