Basic Embryology

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Author:
Vaishali71
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166113
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Basic Embryology
Updated:
2012-08-19 13:48:13
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  1. The fetal heart tube appears by day:

    one
    seven
    fourteen
    twenty one
    twenty one
  2. The heart is completely formed by week:

    one 
    three
    seven
    five
    seven
  3. The heart tube loops:

    anateriorly and leftward
    anteriorly and rightward
    posteriorly and leftward
    posteriorly and righward
    posteriorly and righward
  4. The looping of the heart tube creates the:

    bulbus cordis
    truncus arteriosus
    conus arteriosus
    bulboventricular loop
    bulboventricular loop
  5. The junction betweein the primitive ventricle and bulbus cordis is the:

    truncus arteriosus
    aortic sac
    bulboventricular foramen
    artrioventricular canal
    bulboventricular foramen
  6. Blood flow in the heart tube is directed:

    anteriorly
    posteriorly
    cephalad
    caudad
    cephalad
  7. Which of the following contributes to the formation of the vena cava, coronary sinus and posterior walls of the right and left atrium?

    sinus venosus
    atrioventricular canal
    bulbus cordis
    truncus arteriosus
    sinus venosus
  8. All of the following are associated with the development of the interatrial septum EXCEPT:

    septum primum
    septum secumdun
    foramen ovale
    trabecular septum
    trabecular septum
  9. Which of the following divides the atrioventricular orifice in the fetal heart?

    muscular septum
    bulbus cordis
    septum primum
    endocardial cushions
    endocardial cushions
  10. The primivite ventricle is usually a morphologic:

    right ventricle
    left ventricle
    anterior ventricle
    posterior ventricle
    left ventricle
  11. Which of the following contributes to the formation of the right ventricle, ventricular outflow tracts, and truncus arteriosus?

    septum primum
    truncus arteriosus
    bulbus cordis
    atrioventricular canal
    bulbus cordis
  12. Which of the following contributes to the formation of the aortic and pulmonary trunks:

    septum secundum
    bulbus cordis
    truncus arteriosus
    endocardial cushions
    truncus arteriosus
  13. The third aortic arch contributes to the formation of the:

    interatrial septum
    endocardial cushions
    ductus arteriosus
    internal carotid artery
    internal carotid artery
  14. The fourth aortic arch contributes to the formation of the:

    endocardial cushions
    bulbus cordis
    ductus arteriosus
    aortic arch
    aortic arch
  15. The sixth aortic arch contributes to the formation of all of the following EXCEPT:

    internal carotid artery
    right pulmonary artery
    left pulmonary artery
    ductus arteriosus
    internal carotid artery
  16. The ascending aorta is derived from the:

    truncus arteriosus
    sinus venosus
    aortic sac
    fifth arch
    aortic sac
  17. Which of the following would be considered a cono-truncal abnormality?

    bicuspid arotic valve
    tetralogy of Fallot
    atrioventricular septal defect
    ventricular septal defect
    tetralogy of Fallot
  18. The cardiac tube loops anterior and leftward. This results in:

    d-transposition of the great arteries
    l-transposition 
    mitral stenosis
    total anomalous pulmonary venous return
    l-transposition
  19. Fetal blood oxygenated occurs in the maternal:

    heart
    lungs
    placenta
    aorta
    placenta
  20. Oxygenated blood returns to the fetal heart via the:

    umbilical artery
    umbilical vein
    maternal placenta
    fetal aorta
    umbilical vein
  21. Which valve directs blood from the inferior vena cava to the foramen ovale in the fetal heart:

    tricuspid
    mitral
    thebesian
    eustachian
    eustachian
  22. In the fetal heart, fetal blood at the artial level is shunted right to left via the:

    foramen ovale
    ductus arteriosus
    ligamentum venosum
    ductus venosus
    foramen ovale
  23. The vessel that shunts fetal blood right to left between the pulmonary artery and aorts is the:

    foramen ovale
    ductus arteriosus
    ligamentum venosum
    ductus venosus
    ductus arteriosus
  24. Deoxygenated blood from the fetal heart returns to the maternal placents via the:

    umbilical artery
    umbilical vein
    maternal placenta
    fetal aorta
    umbilical artery
  25. All of the following are true statement concerning events that occur after birth EXCEPT:

    systemic pressure increase
    pulmonary vascular resistance increases
    right heart pressues decreases
    foramen ovale closes
    pulmonary vascular resistance increases
  26. The foramen ovale closes after birht due to an increase in:

    right heart pressures
    left heart pressures
    pulmonary vascular resistance
    respirations
    left heart pressures
  27. The ductus arteriosus closes due to increased:

    systemic pressure
    venous pressure
    respirations
    weight
    systemic pressure
  28. The ductus venosus closes after birth and becomes the:

    ligamentum venosum
    ligamentum arteriosum
    umbilical ligament
    fossa ovalis
    ligamentum venousm
  29. The umbilical artery after birth become the umiblical:

    artery
    vein
    ligament
    venosum
    ligament
  30. The umbilical vein after birth becomes the ligamentum:

    arteriosum
    venosum
    teres
    ovalis
    teres
  31. The foramen ovale after birth becomes the:

    ligamentum arteriosum
    ligamentum venosum
    fossa ovalis
    ligamentum teres
    fossa ovalis
  32. The ductus arteriosus after birth becomes the:

    ligamentum arteriosum
    ligamentum venosum
    fossa ovalis
    ligamentum teres
    ligamentum arteriosum
  33. All of the following are true statments concerning fetal circulation EXCEPT:

    fetal right ventricle is thicker then the left
    right heart handles a larger volume of blood then left
    pulmonary artery branches are underdeveloped at birth
    blood enters the systemic circulation only at the ductus arteriosus level
    blood enters the systemic circulation only at the ductus arteriosus level

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