Cards (2)

  • acrosome reaction 

    sperm attracted to ovum due to chemicals released from it
    when sperm comes in contact acrosome reaction takes place
    the acrosome swells and fuses with the sperm cell membrane releasing digestive enzymes
    enzymes digest pathway through follicle cells and zona pellucida
  • cortical reaction 

    sperm attaches to membrane of ovum and fuses
    cortical granules move towards ovum membrane to release contents into zona pellucida
    zona pellucida hardens
    haploid sperm and ovum nucleus fuse to form diploid zygote nucleus