Development Flashcards
what is capacitation?
- remova of glyco protein of coat
- destablization - show acrosome
- hyperactive
what receptor does sperm bind to and what layer of the ovum
zoma pullucida zp3
what is the fertilization envolope and when does it occur
it is after the slow block, it is the thickened perivitaline
fast vs slow block
fast: Na+ channels open and depolorizes the cell
Slow: Ca+ released from ER and cortical granules are released into the perivitalline
Proteosomes vs deuterostomes (determinant or indeterminate,, sprial or radial)
Proeosomes = determinant and spiral, deuterostomes= radial and indederminant
what stage forms the 3 layers medo ecto and endoderm
gastulation
what is archenteron
the opening in the gastula
what is the blastopore
the indention of the gastula that will form the mouth or anus
what is responsible for HCG
trophoblast
what is the trophoblast
responsible for the placenta and implantation
the bilaminar disc has two layers what are they
epiblast and hypoblast
whats meroblastric cleavage
when there is yolk (egg animals)
what is holoblastic
it is for placental mammals
what is the grey cresent
a mix of the animal pol and vegable pole
frogs undergo holoblastic or meroblastic
holoblastic
Placenta, egg laying, amphibian, sea urchins which have a elongated blastopore and what has a circular blastopore
elongated - placenta and egg laying, circular - is flrogs and sea urchins
what are anamniotes
fish and frogs
what is the chorion for
for gas exchange
what is the alontois
it is for transporting or for waste
what becomes the umbilical chord in animals
alontois
what is responsible for RBC production in the embryo
yolk sack
what is the amnion for
shock absorber
