Term
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Definition
| Fusion of the acrosomal vesicle with the sperm cell membrane and extension of the acrosomal process. |
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Term
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Definition
| Specialized secretory vesicle in the sperm that carries enzymes used to digest the outer coverings of eggs. |
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Term
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Definition
| Motor apparatus in the sperm tail consisting of two central microtubules surrounded by an array of nine doublet microtubules (9 + 2 arrangement). |
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Term
| Cortical granule reaction |
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Definition
| Fusion of cortical granules in the egg with the plasma membrane, resulting in exocytosis of granule contents into the space between the membrane and the vitelline envelope. |
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Term
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Definition
| Membrane- bound packets of proteolytic enzymes, mucopolysaccharides, adhesive glycoproteins, and hyalin protein in eggs that are secreted from the cell upon fertilization. |
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Definition
| ATPase associated with axoneme microtubules that converts chemical energy of ATP into mechanical energy of microtubules sliding past each other, providing the propulsive force of flagella. |
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Term
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Definition
| Conversion of the egg from a metabolically inactive state prior to fertilization to a highly active state required for early embryogenesis following fertilization. |
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Term
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Definition
| A barrier to fertilization by additional sperm mediated by depolarization of the egg cell membrane potential and lasting about one minute after fertilization. |
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Term
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Definition
| Union of haploid gametes to form a diploid zygote. |
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Term
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Definition
| An elevated vitelline envelope that forms in response to fertilization and serves as a mechanical block to fertilization by additional sperm. |
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Term
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Definition
| A developing or immature egg cell. |
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Term
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Definition
| A fully differentiated female germ cell. |
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Term
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Definition
| Entrance of more than one sperm into a single egg, resulting in abnormal development. |
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Term
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Definition
| Haploid nuclei from sperm and egg in the egg after fertilization and prior to fusion to form a diploid nucleus. |
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Term
| Resting membrane potential |
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Definition
| A constant electric potential across a membrane in its normal state. |
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Term
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Definition
| The fertilization envelope, a mechanical block to polyspermy that becomes active about 1 minute after fertilization. |
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Term
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Definition
| A dramatic increase in sperm metabolism and motility in response to an attractant from a mature egg. |
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Term
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Definition
| Extracellular matrix of an egg that controls binding of sperm to egg and access of sperm to the egg plasma membrane. |
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Term
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Definition
| The thick vitelline envelope surrounding the mammalian egg. |
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