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Questions and Answers
The result of this union leads to the production of a fertilized egg called a ______
The result of this union leads to the production of a fertilized egg called a ______
zygote
Various exceptions to this sequence are possible, including artificial ______
Various exceptions to this sequence are possible, including artificial ______
insemination
The acrosome of the sperm produces enzymes which allow it to burrow through the outer shell called the ______ of the egg
The acrosome of the sperm produces enzymes which allow it to burrow through the outer shell called the ______ of the egg
zona pellucida
The process of fertilization involves a sperm fusing with an ______
The process of fertilization involves a sperm fusing with an ______
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The sperm plasma then fuses with the egg's plasma membrane and their nuclei fuse, triggering the sperm head to disconnect from its ______
The sperm plasma then fuses with the egg's plasma membrane and their nuclei fuse, triggering the sperm head to disconnect from its ______
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Study Notes
Human Fertilization
- Human fertilization occurs primarily in the ampulla of the fallopian tube.
- The union of a human egg and sperm results in the production of a fertilized egg called a zygote, initiating embryonic development.
- The process of fertilization involves a sperm fusing with an ovum.
Sequence of Fertilization
- The most common sequence of fertilization begins with ejaculation during copulation, followed by ovulation, and finishes with fertilization.
- Exceptions to this sequence include:
- Artificial insemination
- In vitro fertilization
- External ejaculation without copulation
- Copulation shortly after ovulation
Sperm-Egg Interaction
- Upon encountering the secondary oocyte, the acrosome of the sperm produces enzymes to burrow through the outer shell called the zona pellucida of the egg.
- The sperm plasma then fuses with the egg's plasma membrane, and their nuclei fuse.
- The fusion of nuclei triggers the sperm head to disconnect from its flagella.
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