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49 Cards in this Set
- Front
- Back
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1. Oligohydramnios is a condition of ______ amniotic fluid.
A. too much B. too little |
B. too little
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2. Dizygotic twins occur ____ than monozygotic twins.
A. more frequently B. less frequently |
A. more frequently
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3. Which of the following persist throughout pregnancy?
A. amnion B. allantois C. yolk sac D. all of the above persist |
A. amnion
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4. Which of the following is found in the primitive umbilical cord, but is not present in the mature cord?
A. umbilical artery B. umbilical vein C. intestinal loop D. all of the above are found in both |
C. intestinal loop
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5. Conjoined twins are always dizygotic.
A. true B. false |
B. false
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6. Paracrine signalling occurs over shorter distances than juxtacrine signalling.
A. true B. false |
B. false
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7. Which of the following develops the multiple layers of the epidermis of the skin?
A. periderm B. basal layer C. vernix caseosa D. chorium |
B. basal layer
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8. Which of the following develops into the dermis of the skin?
A. periderm B. basal layer C. vernix caseosa D. chorium |
D. chorium
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9. Which of the following is an exchange site between the embryo and the amniotic fluid during the first trimester?
A. periderm B. basal layer C. vernix caseosa D. chorium |
A. periderm
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10. Which of the following forms a protective covering of the surface of the skin during the last part of pregnancy?
A. periderm B. basal layer C. vernix caseosa D. chorium |
C. vernix caseosa
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11. Which of the following develops as a downgrowth of the epidermis?
A. eccrine sweat glands B. mammary glands C. apocrine sweat glands D. all of the above |
D. all of the above
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12. Hypertrichosis is frequently associated with spina bifida cystica.
A. true B. false |
B. false
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13. Skeletal muscle is derived from:
A. splanchnic mesoderm B. somatic mesoderm C. both D. neither |
D. neither
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14. Muscles of the tongue are derived from:
A. cervical myotomes B. preotic myotomes C. occipital myotomes D. none of the above |
C. occipital myotomes
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15. The muscular part of the diaphragm is derived from the hypomere of cervical somites.
A. true B. false |
A. true
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16. The extensor muscles of the back are derived from the:
A. epimere B. hypomere C. both D. neither |
A. epimere
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17. Muscles of the limbs are innervated by the ____ rami of spinal nerves.
A. dorsal B. ventral |
B. ventral
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18. Smooth muscle may be derived from either the epimere or the hypomere.
A. true B. false |
B. false
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19. The intercostal muscles are derived from the:
A. epimere B. hypomere C. splanchnic mesoderm D. somatic mesoderm |
B. hypomere
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20. All of the following are derived from the hypomere except:
A. sternohyoid muscle B. deltoid muscle C. iliopsoas muscle D. all are derived from the hypomere. |
D. all are derived from the hypomere.
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21. Bones of the viscerocranium develop by _______ ossification.
A. intramembranous B. endochondral C. both D. neither |
A. intramembranous
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22. The cranial vault develops by both intramembranous and endochondral ossification.
A. true B. false |
B. false
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23. The bones of the upper extremity develop by _______ ossification.
A. intramembranous B. endochondral C. both D. neither |
B. endochondral
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24. The bones of the face are derived from neural crest cells.
A. true B. false |
A. true
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25. The rostral limit of the notochord is at the level of the occipital bone.
A. true B. false |
B. false
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26. The skeletal system is derived from:
A. ectoderm B. mesoderm C. both D. neither |
C. both
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27. The AER develops within the:
A. ectoderm B. mesoderm C. both D. neither |
A. ectoderm
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28. Which of the following develops latest?
A. femur B. talus C. they both develop at the same time |
B. talus
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29. The digits of the extremity form by the process of:
A. the division of the AER into five segments B. apoptosis of cells in the hand/foot plate C. both D. neither |
C. both
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30. The proximal/distal axis of the developing limb is determined by the AER.
A. true B. false |
A. true
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31. Premature closure of the sutures of the cranial vault results in:
A. craniosynostosis B. cranioschisis C. Klippel-Feil syndrome D. achondroplasia. |
A. craniosynostosis
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32. Failure of the sclerotomal cells on one side of the developing vertebra to completely form results in hemivertebra.
A. true B. false |
A. true
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33. Bones of the base of the cranium develop by endochondral ossification.
A. true B. false |
A. true
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34. As the lower limb develops, it normally rotates:
A. laterally B. medially |
B. medially
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35. Motor neurons of the lateral horn of the spinal cord are derived from the:
A. alar plate B. basal plate C. neural crest D. roof plate |
B. basal plate
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36. The choroid plexus of the brain develops from the:
A. alar plate B. basal plate C. floor plate D. roof plate |
D. roof plate
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37. Schwann cells are derived from the:
A. alar plate B. basal plate C. neural crest D. roof plate |
C. neural crest
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38. The cranial flexure develops between the spinal cord and the medulla oblongata.
A. true B. false |
B. false
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39. The mantle layer of the developing spinal cord appears _____ the marginal layer appears.
A. before B. after |
A. before
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40. The cranial neuropore normally closes _____ the caudal neuropore closes.
A. before B. after C. at the same time as |
A. before
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41. The sulcus limitans separates the ____ from the _____.
A. mesencephalon, metencephalon B. telencephalon, diencephalon C. metencephalon, myelencephalon D. alar plates, basal plates |
D. alar plates, basal plates
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42. Distinct basal and alar plates can be distinguished in each of the following except:
A. metencephalon B. mesencephalon C. telencephalon D. myelencephalon |
C. telencephalon
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43. The cerebellum develops from the:
A. mesencephalon B. metencephalon C. myelencephalon D. diencephalon |
B. metencephalon
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44. Hydrocephalus results from the premature closure of the sutures of the skull.
A. true B. false |
B. false
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45. Arnold-Chiari malformation is sometimes associated with spina bifida cystica.
A. true B. false |
A. true
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46. The lamina terminalis is found in the:
A. spinal cord B. prosencephalon C. mesencephalon D. rhombencephalon |
B. prosencephalon
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47. Ependymal cells contribute to the formation of the:
A. alar plates B. basal plates C. sensory ganglia D. choroid plexus |
D. choroid plexus
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48. The cerebellum is derived from the:
A. alar plates B. basal plates C. both D. neither |
A. alar plates
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49. The optic chiasma is found in the lamina terminalis.
A. true B. false |
A. true
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