Polyspermy
What is Polyspermy
When more than one sperm fuse with an egg
Where is this hormone secreted from?
The chorion
what is embryonic diapause?
A fertilized egg/zygote/blastocyst is arrested in development until favorable conditions
What causes the initial stop of sperm binding
Hint (happens with in 1-2 seconds)
A fast block- influx of sodium ions changing the polarity of the plasma membrane to positive
At what speed does it increase at for the first 8-10 weeks?
1.5x
3 factors affecting diapuase?
Temperature, Food, Lactation, Season, Predators
What does osmosis have to do with polyspermy?
Lifts the vitelline layer away from the cytoplasm, allowing it to harden.
The placenta
What animals are capable of diapause?