Dom Flashcards
Condensation of somites occurs after epithelial to mesenchymal transition
Falso
paraxial mesoderm will give rise to the dermis of the back
Vero
Somitogenesis occurs in cranio-caudal sequence
Vero
The notochord is a mesodermal derivative
Vero
Skeletal muscles of the limbs derive from somatic (parietal) mesoderm
Falso
Otic placodes initially develop as thickening of the surface ectoderm in correspondence of the rhombencephalon
Vero
The notochord gives rise to a wide portion of the vertebrae of the adult
Falso
Hatching of the blastocyst occurs following enzymatic digestion of the zona pellucida
Vero
Hox genes, in humans, are found in four clusters, each containing 8 genes
Falso
Gastrulation occurs at the beginning of third week of development
Vero
During neural induction BMP4is further inhibited by noggin, Chordin and follistatin produced by primitive streak
Falsa
The Heuser’s membrane is formed from the yolk sack around 8-9 days of development
Vero
Gap junctions are anchored to keratin filaments
Falso
At the cytoplasmic level, the macula adherens (desmosomes) anchors itself to actin filaments
Falso
Secondary spermatocytes are formed at the end of the second meiotic division.
Falso
The secondary oocyte is arrested in metaphase II
Vero
The ovogonium is blocked in Prophase 1 (diplotene)
Falso
Cortical granules are already present in the pre-antral follicle
Vero
Anti-Mullerian hormone is produced and secreted by Sertoli cells
Vero
The pharyngeal pouches are entirely of endodermal origin
Vero
Failure of the neuropore to close causes a birth defect known as spina bifida.
Vero
Sertoli and Leydig cells express estrogen receptors
Vero
The limb bones are derived from the somatic lateral mesoderm
Vero
The viscerocranium is derived entirely from neural crest cells
Vero
