reproductive Flashcards
(245 cards)
Wnt-7 gene
production at apical ectodermal ridge,
thickened ectoderm at distal end of each developing limb
necessary for proper organization along dorsal-central axis
Sonic hedgehog gene
proced at the base of linbs in zone of polarization
involved in patterning along anterior posterior axis
involved in CNS development
mutation can cause holoprosencephaly
FGF gene
production at apical ectodermal ridge
stimulation mitosis of underlying mesoderm
providing for lengthening of limbs
Homeobox, HOX genes
Involved in segmented organization of embryo in a craniocaudal direction.
HOX mutation–>appendages in wrong location
hCG secretion happens in?
week 1
detected by urine in 2weeks
bilaminar disc develop in
week2
trilaminar disc develop in?
week 3
gastrulation happens in
wk 3
what appears in wk 3?
primitive streak, notochord, mesoderm and it’s organization, neural plate begin to form
organogenesis happens in?
3-8WK
neural tube closes in
3-8wk
heart begin to beat
wk 4
upper and lower limb begin to bud
wk 4
fetal movement begin?
wk8
genitalial development
wk10
gastrulation
process that forms the trilaminar embryonic disc
establishs the ectoderm, mesoderm and endoderm germ layers
starts with epiblast invagination to form primitive streak
absent organ due to absent primordial tissue
agenesis
absent of tissue despite present primordial tissue
aplasia
extrinsic disruption, occurs after embryonic period
deformation
incomplete organ develoment
primordial tissue present
hpoplasia
intrinsic disruption, occurs during the embryonic period
wk 3-8
malformation
ACE inhibitor
renal damage
Alkylating agents
absence of digits
multiple anomalies
aminoglycoside
CN VIII toxicity