Week 2: Making Babies

25 Questions | Total Attempts: 82

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Week 2: Making Babies

Week 2 lecture material pertaining to embryology


Questions and Answers
  • 1. 
    Characteristics that are differentially expressed depending on whether the genetic material is inherited from the mother or father represent:
    • A. 

      Genomic inheritance

    • B. 

      Genomic imprinting

    • C. 

      Chromosomal inheritance

    • D. 

      Inheritance of contiguous gene complexes

    • E. 

      Germline mosaicism

  • 2. 
    A 22 year old woman in her 8th week of pregnancy tells you that there is a history of neural tube defect in her family. What do you tell her?
    • A. 

      She is young and has been taking folic acid so her baby is most likely completely normal

    • B. 

      She should terminate the fetus and not have children

    • C. 

      She is at no increased risk because she is otherwise healthy and has no other risk factors

    • D. 

      She is at no increased risk because she is under 35 and the father's family has no history of neural tube defects

    • E. 

      She is high risk and should have the baby evaluated using prenatal screening techniques

  • 3. 
    The cytoplasm of the egg is capable of __________________ nuclei derived form adult tissues.
    • A. 

      Inducing pluripotent stem cells in

    • B. 

      Gene reprogramming

    • C. 

      Silencing

    • D. 

      Differential splicing of

    • E. 

      Regenerating

  • 4. 
    Future somite is derived from _____________ mesoderm formed to the side of the notochord.
  • 5. 
    Posterior remnants of the primitive streak cause
    • A. 

      Sirenomelia

    • B. 

      Sacroccoygeal teratomas

    • C. 

      DiGeorge's Syndrome

    • D. 

      Twinning

    • E. 

      Piebald

  • 6. 
    True or False: Splitting of early embryonic cells at the two cell stage is the most common way that identical twins are produced.
    • A. 

      True

    • B. 

      False

  • 7. 
    A surge in ______ causes follicular rupture and ovulation.
  • 8. 
    A shifting of the forelimb one segment cranially might be due to abnormal expression of what gene?
    • A. 

      BMPs

    • B. 

      Sonic hedgehog

    • C. 

      HOX genes

    • D. 

      TGF-Beta

    • E. 

      FGFs

  • 9. 
    Homeobox genes are
    • A. 

      Not expressed in flies

    • B. 

      Only expressed in humans

    • C. 

      Cause epithelial to mesenchymal transitions

    • D. 

      Regulate migration of neural crest cells

    • E. 

      Regulate patterning of cranial-caudal axis, including segmentation

  • 10. 
    Which layer(s) of the embryonic disc is/are present at the end of the second week of development.?
    • A. 

      Epiblast

    • B. 

      Endoderm and mesoderm

    • C. 

      Epiblast and hypoblast

    • D. 

      Hypoblast and neural crest

    • E. 

      Ectoderm and mesoderm

  • 11. 
    What initial morphological change occurs prior to gastrulation?
    • A. 

      Migration of ectoderm to the midline

    • B. 

      Formation of the notochord

    • C. 

      Formation of the primitive streak

    • D. 

      Separation of epiblast and hypoblast

    • E. 

      Formation of morula

  • 12. 
    Melanocytes are derived from
    • A. 

      Neural crest cells

    • B. 

      Mesoderm

    • C. 

      Endoderm

    • D. 

      Ectoderm

    • E. 

      Dermis

  • 13. 
    What causes congenital megacolon?
    • A. 

      Lack of sympathetic innervation to the bowel

    • B. 

      Abnormal neural crest cell migration

    • C. 

      Lack of formation of smooth muscle in the gut

    • D. 

      Mutation in the c-kit receptor

    • E. 

      Abnormal endoderm division

  • 14. 
    Splitting of the lateral plate mesoderm forms
    • A. 

      Yolk sac cavity

    • B. 

      Aminotic cavity

    • C. 

      Chorionic cavity

    • D. 

      Intraembryonic cavity

    • E. 

      Somites

  • 15. 
    What are the pons and cerebelleum derivatives of?
    • A. 

      Telencephalon

    • B. 

      Mesencephalon

    • C. 

      Diencephalon

    • D. 

      Rhombencephalon

    • E. 

      Metencephalon

  • 16. 
    It was determined that a woman had contracted rubella during her pregnancy which resulted in cardiac defects in her baby, during which point is it most likely that she contracted this disease?
    • A. 

      1-5 weeks before fertilization

    • B. 

      4-5 months after fertilization

    • C. 

      6-7 months after fertilization

    • D. 

      1-5 weeks after fertilization

    • E. 

      3 months before fertilization

  • 17. 
    What forms bones of the face?
    • A. 

      Neural crest cells from the 1st and 2nd pharyngeal arches

    • B. 

      Primitive node

    • C. 

      Paraxial mesoderm

    • D. 

      Ectoderm

    • E. 

      Gastrulation

  • 18. 
    What forms the urogenital system?
    • A. 

      Endoderm

    • B. 

      Lateral plate mesoderm

    • C. 

      Splachnic layer

    • D. 

      Axial mesoderm

    • E. 

      Intermediate mesoderm

  • 19. 
    What forms placental vili to invade the uterus?
    • A. 

      Blastocyst

    • B. 

      Synctiotrophoblast

    • C. 

      Cytotrophoblast

    • D. 

      Epiblast

    • E. 

      Hypoblast

  • 20. 
    Which of the following factors does NOT affect fetal growth?
    • A. 

      Glucose and insulin availability

    • B. 

      Amino acids

    • C. 

      Alcohol consumption and smoking

    • D. 

      Genetic makeup of the baby

    • E. 

      Number of ultrasounds taken

  • 21. 
    An environmental agent that can cause developmental disruptions following maternal exposure is known as a ___________________.
  • 22. 
    Brown fat, quickening, and vernix caseosa appear during weeks:
    • A. 

      17-20

    • B. 

      1-10

    • C. 

      21-26

    • D. 

      35-38

    • E. 

      9-14

  • 23. 
    In a fetus, the sites of erythropoiesis move from
    • A. 

      Spleen to liver to bone marrow

    • B. 

      Placenta to liver to spleen

    • C. 

      Liver to spleen to bone marrow

    • D. 

      Bone marrow to spleen

    • E. 

      Core bones to limbs

  • 24. 
    Around weeks ________ a fetus can be determined to be male or female via ultrasound.
    • A. 

      14-16

    • B. 

      3-5

    • C. 

      9-12

    • D. 

      1-8

    • E. 

      5-10

  • 25. 
    If born around week _____, a baby can survive.
    • A. 

      6

    • B. 

      12

    • C. 

      16

    • D. 

      20

    • E. 

      26