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cell physiology > Fertilzation > Flashcards

Fertilzation Flashcards

1
Q

In the Acrosome rxn, first sperm must recognize ______ molecules in the _____

A

Species specific
Zona pellucida

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2
Q

In the second step of Acrosome rxn, binding of capacitated sperm to zona pellucida induces ______

A

Fast increase in sperm intercellular Ca+

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3
Q

In the third step of Acrosome rxn, _____ are released, allowing _____

A

Digestive enzymes (hyaluronidase)
Sperm to transverse to egg surface

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4
Q

What ends the acrosome rxn and begins fertilization

A

Sperm and egg membranes fuse

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5
Q

What happens when the membranes of sperm and egg fuse what occurs? What does this cause?

A

Large increase of Ca+ in cytoplasm of eggs
Causes discharge of cortical granules

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6
Q

Cortical granules:
Activates _____ which now completes _____
Modify _____ so that ______

A

Dormant oocyte, Meiosis II
Zone pellucida; no other sperm able to bind egg

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7
Q

Where does fertilization occur? What happens?

A

Oviduct (fallopian tube)
Nuclei unite = zygotic embryo

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8
Q

The zygote is transported by _____ to the _____ for _____

A

Cilia; uterus; implantation

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cell physiology (17 decks)

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