4 steps fertilization ?
sperm enter the egg
penetration of sperm through egg envenlope with or without adhesion to vitelline envelope
plasma contact and fusion
sucess of fertilization requires ?
parental mating behavior
sperm capability to penetrate the zona pellucida
process sperm movement by chemical attractants called ?
what occurs when sperm contacts egg jelly coat ?
acrosome release hormone by exocytosis
acrosomal enzyme digest a hole hole into egg jelly
formation of acrosomal process
sperm egg adheision ?
acrosome process extend to vitelline envelope
species specific adhesion occurs
gamete fusion ?
fusion of egg and sperm plasma membranes
gamete fussion trigger egg activation (formation of fertilize cone)
egg jelly glycoprotein bind to receptor rise Ca to cause ?
protein cover acrosomal process is ?
in sea urchin sperm adhere at ?
jelly coat and plasma membrane
in mammal, sperm adhere at ?
zona pellucida (vitellin envelope)
what space sperm enter between egg plasma membrane and zona pellucida ?
what protein cause sperm stick to surface of the egg ?
zona pellucida protein
which ZP3 bind sperm during sperm egg adhesion ?
ZP3 from unfertilized eggs
what acceleration of egg metabolism before cleavage ?
what second messenger system activated ?
protein kinase C
what regulate in second messenger system ?
what reaction lead to slow block to polyspermy ?
what ions across egg membrane to trigger cell cycle to begin ?
fertilization potential ?
contact with sperm cause temporary change in membrane potential
when second messenger activated ?
contact between plasma membrane activate sperm receptor
what important to produce calcium ions ?
what cause IP3 generated ?
plasma membrane contact
plasma membrane contact together with gamete fusion
when fertilization releases egg from ?
the 2nd meiotic block
fusion of pronuclei forms the zygote called ?
excess of adhesion sites could lead to ?
polyspermy , fertilization of single egg by multiple sperm
what alternates with sexual reproduction ?