Question

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Hᴏᴡ ɪs ᴘᴏʟʏsᴘᴇʀᴍʏ ᴄʜᴇᴄᴋᴇᴅ ʙʏ ᴛʜᴇ ᴢᴏɴᴀ ᴘᴇʟʟᴜᴄɪᴅᴀ ᴏғ ᴛʜᴇ ᴏᴠᴜᴍ?
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Answer 1

Explanation:

1) fast block polyspermy

it is achieved by influx of sodium ions into ova which results in the depolarization of the membrane that is ova removes sperm receptors

2)slow block polyspermy

done with the help of calcium ions which results in the movement of cortical granules of egg cortex and thickening of zona pellucida

hope it helps you mate ...

Answer 2

ᴛʜᴇ ᴢᴏɴᴀ ᴘᴇʟʟᴜᴄɪᴅᴀ ɪs ᴀ ᴛʜɪᴄᴋ ʟᴀʏᴇʀ ᴛʜᴀᴛ ɪs ɢɪʀᴅʟᴇᴅ ʙʏ ᴄᴏʀᴏɴᴀ ʀᴀᴅɪᴀᴛᴀ ᴄᴇʟʟs. ᴅᴜʀɪɴɢ

ғᴇʀᴛɪʟɪᴢᴀᴛɪᴏɴ, ᴄᴏʀᴛɪᴄᴀʟ ɢʀᴀɴᴜʟᴇs ᴀʀᴇ ʀᴇʟᴇᴀsᴇᴅ ғʀᴏᴍ ᴛʜᴇ ᴇɢɢ ᴡʜɪᴄʜ ʙʟᴏᴄᴋs ғᴜsɪɴɢ ᴏғ

ᴍᴜʟᴛɪᴘʟᴇ sᴘᴇʀᴍs ᴡɪᴛʜ ᴀɴ ᴇɢɢ.

Hope it helps...

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