Developmental Biology Fertilization Ii - Gamete Fusion

Front 1

fusogenic protein in mammals

Back 1

fertilin

Front 2

Polyspermy prevention in sea urchins that's electric and mediated by Na+ ion channels

Back 2

fast block

Front 3

Polyspermy pervention in sea urchins and mammals mediated by Ca ions from within the egg

Back 3

slow block

Front 4

During slow block in sea urchins & many other animals, ________ ________ release (via exocytosis) many proteins

Back 4

cortical granules

Front 5

_________ dissolves the proteins that connect the vitelline envelope to the plasma membrane and "clip off" any sperm/bindin attached.

Back 5

Proteases

Front 6

During slow block of sea urchin, ____________________ produce an osmotic gradient so water rushes in between the vitelline envelope and the egg plasma membrane (now called the fertilization envelope)

Back 6

Mucopolysaccharides

Front 7

During slow block of sea urchin, __________ ______ hardens the fertilization envelope.

Back 7

peroxidase enzyme

Front 8

During slow block of sea urchin, ______ forms a coat around the egg.

Back 8

Hyalin

Front 9

During slow block of mammals, enzymes released by the cortical granule modify ___ & ___. Hypothesis: one enzyme clips off the terminal _____ residuals on the ___.

Back 9

ZP3, ZP2, sugar, ZP3

Front 10

T/F The activation of egg metabolism occurs in the cytoplasm with no nuclear involvement.

Back 10

True

Front 11

Activation of egg metabolism depends o the [__] ions withing the egg -- all egs.

Back 11

Ca

Front 12

During the fusion of genetic material, the __________ comes mainly from the sperm

Back 12

centrosome

Front 13

Displacement of ___ _________ happens by cortical rotation depending on sperm point of entry

Back 13

egg cytoplasm

Front 14

The pH increase (a late response of egg metabolism) will eventually stimulate new _______ synthesis & ___ synthesis

Back 14

protein, DNA

Front 15

Rhythm in cell division is regulated by

Back 15

cyclin