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Histo > Dom > Flashcards

Dom Flashcards

1
Q

Condensation of somites occurs after epithelial to mesenchymal transition

A

Falso

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2
Q

paraxial mesoderm will give rise to the dermis of the back

A

Vero

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3
Q

Somitogenesis occurs in cranio-caudal sequence

A

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4
Q

The notochord is a mesodermal derivative

A

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5
Q

Skeletal muscles of the limbs derive from somatic (parietal) mesoderm

A

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6
Q

Otic placodes initially develop as thickening of the surface ectoderm in correspondence of the rhombencephalon

A

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7
Q

The notochord gives rise to a wide portion of the vertebrae of the adult

A

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8
Q

Hatching of the blastocyst occurs following enzymatic digestion of the zona pellucida

A

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9
Q

Hox genes, in humans, are found in four clusters, each containing 8 genes

A

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10
Q

Gastrulation occurs at the beginning of third week of development

A

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11
Q

During neural induction BMP4is further inhibited by noggin, Chordin and follistatin produced by primitive streak

A

Falsa

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12
Q

The Heuser’s membrane is formed from the yolk sack around 8-9 days of development

A

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13
Q

Gap junctions are anchored to keratin filaments

A

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14
Q

At the cytoplasmic level, the macula adherens (desmosomes) anchors itself to actin filaments

A

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15
Q

Secondary spermatocytes are formed at the end of the second meiotic division.

A

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16
Q

The secondary oocyte is arrested in metaphase II

A

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17
Q

The ovogonium is blocked in Prophase 1 (diplotene)

A

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18
Q

Cortical granules are already present in the pre-antral follicle

A

Vero

19
Q

Anti-Mullerian hormone is produced and secreted by Sertoli cells

A

Vero

20
Q

The pharyngeal pouches are entirely of endodermal origin

A

Vero

21
Q

Failure of the neuropore to close causes a birth defect known as spina bifida.

A

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22
Q

Sertoli and Leydig cells express estrogen receptors

A

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23
Q

The limb bones are derived from the somatic lateral mesoderm

A

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24
Q

The viscerocranium is derived entirely from neural crest cells

A

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25
Q

Cadherins generate cell-cell adhesion through homomeric bonds

A

Vero

26
Q

Pax-1 is a transcription factor expressed by migrating neural crest cells.

A

Falso

27
Q

Serotonin is a signal that specifies the structures on the right side of the embryo

A

Vero

Histo (3 decks)

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