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Difference between fast block to check polyspermy and slow block to check polyspermy

Difference between fast block to check polyspermy and slow block to check polyspermy

Grade:12

3 Answers

Aabid Hussain
askIITians Faculty 571 Points
4 years ago

Dear Saket,

The
slow block to polyspermyin the sea urchin embryo consists of a physical barrier to further sperm penetration into the egg. Cortical granule exocytosis results in the formation of the fertilization envelope (often called the fertilization "membrane", even though the structure is not a true membrane)


Thefast block to polyspermyinvolves the opening of Na+ channels in the egg plasma membrane. Na+ flows into the egg cell, depolarizing the membrane. This depolarization prevents additional sperm from fusing to the egg plasma membrane.

Hope I answered your question

DIWAKAR PANDEY
168 Points
4 years ago
further sperm penetration into the egg. Cortical granule exocytosis results in the formation of the fertilization envelope (often called the fertilization "membrane", even though the structure is not a true membrane)Thefast block to polyspermyinvolves the opening of Na+ channels in the egg plasma membrane. Na+ flows into the
SR Roy
128 Points
3 years ago
Theslow block to polyspermyin the sea urchin embryo consists of a physical barrier to further sperm penetration into the egg. Cortical granule exocytosis results in the formation of the fertilization envelope (often called the fertilization "membrane", even though the structure is not a true membrane)

Thefast block to polyspermyinvolves the opening of Na+ channels in the egg plasma membrane. Na+ flows into the egg cell, depolarizing the membrane. This depolarization prevents additional sperm from fusing to the egg plasma membrane.

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