Difference between revisions of "Fertilisation - Anatomy & Physiology"
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(New page: == Fusion with the Oocyte == == Cortical Reaction - Block to Polyspermy == == Formation of Pronuclei ==) |
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== Fusion with the Oocyte == | == Fusion with the Oocyte == | ||
| − | + | * When the Spermatozoan completely penetrates the Zona Pellucida and reaches the Perivitelline Space, it settles into a bed of '''microvilli''' formed by the Oocyte plasma membrane. | |
| + | * Oocyte plasma membrane fuses with the '''equitorial segment''' and the fertilizing Spermatozoon is engulfed. | ||
| + | **Brought about by a fusion protein that is inactive prior to the acrosome reaction. | ||
| + | * Nucleus of the Spermatozoon is within the Oocyte cytoplasm. | ||
| + | * Sperm nuclear membrane disappears. | ||
| + | * Sperm '''nucleus decondenses'''. | ||
== Cortical Reaction - Block to Polyspermy == | == Cortical Reaction - Block to Polyspermy == | ||
Revision as of 14:39, 3 July 2008
Fusion with the Oocyte
- When the Spermatozoan completely penetrates the Zona Pellucida and reaches the Perivitelline Space, it settles into a bed of microvilli formed by the Oocyte plasma membrane.
- Oocyte plasma membrane fuses with the equitorial segment and the fertilizing Spermatozoon is engulfed.
- Brought about by a fusion protein that is inactive prior to the acrosome reaction.
- Nucleus of the Spermatozoon is within the Oocyte cytoplasm.
- Sperm nuclear membrane disappears.
- Sperm nucleus decondenses.