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Sperm in the Female Tract - Anatomy & Physiology
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Revision as of 08:31, 8 September 2008
12 bytes added
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08:31, 8 September 2008
→Penetrating the Zona Pellucida
Line 69:
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** '''Zona protein 3''': binds to proteins on the spermatozoal membrane.
** '''Zona protein 3''': binds to proteins on the spermatozoal membrane.
* The sperm plasma membrane contains two zona binding sites:
* The sperm plasma membrane contains two zona binding sites:
−
** Primary zona binding region: responsible for adherence to the zona pellucida.
+
**
'''
Primary zona binding region
'''
: responsible for adherence to the zona pellucida.
−
** Acrosome reaction promoting ligand: when this binds to the zona protein 3, signal transduction occurs to initiate the acrosome reaction.
+
**
'''
Acrosome reaction promoting ligand
'''
: when this binds to the zona protein 3, signal transduction occurs to initiate the acrosome reaction.
* After the acrosome reaction, zona penetration is a rapid process (minutes).
* After the acrosome reaction, zona penetration is a rapid process (minutes).
* The acrosome reaction releases enzymes:
* The acrosome reaction releases enzymes:
Lwilkie
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