Liz Maas
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Liz Maas
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General Embryology II (CF2)

General Embryology II (CF2)

Question 1 of 9

1

The primitive streak begins at the cranial end and progresses towards the caudal end. The epiblast cells of the primitive streak form a node and displace the hypoblast to give rise to endoderm.

Select one of the following:

  • Both true

  • First true, second false

  • First false, second true

  • Both false

Explanation

Question 2 of 9

1

Which of the following is correct?

Select one of the following:

  • The oropharyngeal membrane becomes the stomodeum

  • The cloacal membrane will become the anus

  • cells at the node move posteriorly to form the notochord

  • all of the above

  • only the ones about membranes

Explanation

Question 3 of 9

1

Which of the following are derivatives of the neural crest cells?

Select one of the following:

  • odontoblasts

  • craniofacial skeleton

  • adrenal medulla

  • all of the choices

  • adrenal medulla and odontoblasts

Explanation

Question 4 of 9

1

Noggin, chordin, and follistatin are secreted by the dorsal mesoderm/notochord. They serve as inhibitors of BMP4 of the neural plate to convert ectoderm into neural tissue.

Select one of the following:

  • Both true

  • First true, second false

  • First false, second true

  • Both false

Explanation

Question 5 of 9

1

Which of the following is incorrectly matched?

Select one of the following:

  • anterior pituitary from Rathke's pouch

  • melanocytes from neural crest

  • dentine of teeth from neural crest

  • these are all right.

  • facial cartilage from neural crest

Explanation

Question 6 of 9

1

Neural tube closure is initiated at the future midbrain and closure goes in both directions. The order of formation is elevation, folding, convergence, closure.

Select one of the following:

  • Both true

  • First true, second false

  • First false, second true

  • Both false

Explanation

Question 7 of 9

1

Which of the following is correct?

Select one of the following:

  • Cranial NC is derived from hindbrain, does craniofacial skeletal elements

  • Sacral NC becomes parasympathetic enteric ganglia of the gut

  • Vagal NC becomes parasympathetic enteric ganglia of the gut

  • All of the things

  • Vagal and Cranial

Explanation

Question 8 of 9

1

Which of the following is incorrect?

Select one of the following:

  • DiGeorge has a large deletion in Tbx1 from large deletion in chromosome 22

  • Hirschsprung has mutations in Sox10 and Endothelin receptor B causes megacolon, pigmentation defects, and deafness

  • Treacher Collins involves mutations in TCOF1 leading to small jaws, cleft palate, and defects of the middle and external ear

  • none, it's all good.

  • Neurocristopathies are defects specifically of the neural crest cells themselves

Explanation

Question 9 of 9

1

The trigeminal placode includes the opthalmic ganglia. The epibranchial placode includes the geniculate, petrosal, and nodose ganglia which are all associated with CN10.

Select one of the following:

  • Both true

  • First true, second false

  • First false, second true

  • Both false

Explanation

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