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All of the following structures are necessary for blastocyst implantation EXCEPT?
Zona pellucida
Syncytiotrophoblast
Cytotrophoblast
Functional layer of endometrium
Ovarian cancer
Appendicitis
Normal pregnancy
Ectopic tubal pregnancy
Toxemia of pregnancy
A) Hypoblast cells
B) Extraembryonic ectoderm
C) Notochordal cells
D) Epiblast cells
E) Amnioblasts
A) Lacunae form within the cytotrophoblast
B) Hydrolytic enzymes produced by the trophoblast degrade the endothelium of embryonic capillaries
C) It is established during the second week of development
D) It is a transient nutrient supply for the blastocyst during implantation
E) It only forms in ectopic implantations
A) Exocoelomic membrane and cytotrophoblast
B) Epiblast and hypoblast
C) Syncytiotrophoblast and endometrium
D) Exocoelomic membrane and syncytiotrophoblast
E) Syncytiotrophoblast and cytotrophoblast
A) It is composed of small cuboidal cells
B) It forms the roof of the blastocyst cavity
C) It forms the primitive streak
D) Notochordal cells intercalate into it
A) Weeks 1-5 before fertilization
B) Weeks 1-5 after fertilization
C) Months 4-5 after fertilization
D) Months 5-6 after fertilization
E) Weeks 9 to 12 after fertilization
A) Prechordal plate
B) Cloacal membrane
C) Primitive streak
D) Neural tube
E) somites
A) Hydatidiform mole
A) Premature rupture of the amniotic membrane
B) Placenta previa
C) Toxemia of pregnancy
D) Vasa previa
True
False
A) Paraxial mesoderm contributes to formation of both areas
B) HOX genes contribute to both areas and could be involved
C) Body folding is important for both areas and may produce combined defects
D) The mother took fertility drugs
E) Neural crest cells contribute greatly to development of both regions
A) Epidermis
B) Enamel of teeth
C) Dermis of skin
D) Forebrain
E) Mammary gland
A) hindbrain
B) Schwann cells
C) aorta
D) intestinal epithelia
E) nails
A) Ovary
B) Mesentery of the intestine
C) Abdomen
D) ampullae region of uterine tube
E) isthmus region of uterine tube
A) lateral plate mesoderm
B) ectoderm
C) neural crest cells
D) endoderm
E) intermediate mesoderm
A) somites
B) paraxial and intermediate mesoderm
C) yolk sac cavity
D) intraembryonic cavity
E) amniotic cavity
A) mesoderm
B) mesenchyme
C) ectoderm
D) neural crest cells
E) dermis
A) cytotrophoblast
B) outer cell mass
C) endoderm
D) inner cell mass
E) ectoderm
A) endoderm
B) lateral plate mesoderm
C) ectoderm
D) splanchnic mesoderm
E) intermediate mesoderm
A) Neural plate
B) Cloacal membrane
C) Posterior neuropore
D) Primitive streak
E) Notochord
A) extraembryonic mesoderm
B) embryoblast
C) exocoelomic membrane
D) connecting stalk
E) chorion