What does Zona Pellucida mean?
Definitions for Zona Pellucida
ˈzoʊ nə pəˈlu sɪ də, pɛlˈyu-; ˈzoʊ ni pəˈlu sɪˌdi, pɛlˈyu-zon·a pel·lu·ci·da
This dictionary definitions page includes all the possible meanings, example usage and translations of the word Zona Pellucida.
Princeton's WordNet
zona pellucidanoun
thick membrane around the mammalian ovum; can be penetrated by one sperm in the fertilization process; usually remains around the fertilized egg until it is implanted in the wall of the uterus
Wiktionary
zona pellucidanoun
A glycoprotein membrane surrounding the plasma membrane of an oocyte
Etymology: zona + pellucidus.
Wikipedia
Zona pellucida
The zona pellucida (plural zonae pellucidae, also egg coat or pellucid zone) is a specialized extracellular matrix that surrounds the plasma membrane of mammalian oocytes. It is a vital constitutive part of the oocyte. The zona pellucida first appears in unilaminar primary oocytes. It is secreted by both the oocyte and the ovarian follicles. The zona pellucida is surrounded by the corona radiata. The corona is composed of cells that care for the egg when it is emitted from the ovary.This structure binds spermatozoa, and is required to initiate the acrosome reaction. In the mouse (the best characterised mammalian system), the zona glycoprotein, ZP3, is responsible for sperm binding, adhering to proteins on the sperm plasma membrane. ZP3 is then involved in the induction of the acrosome reaction, whereby a spermatozoon releases the contents of the acrosomal vesicle. The exact characterisation of what occurs in other species has become more complicated as further zona proteins have been identified.In humans, five days after the fertilization, the blastocyst performs zona hatching; the zona pellucida degenerates and decomposes, to be replaced by the underlying layer of trophoblastic cells. The zona pellucida is essential for oocyte growth and fertilization.
ChatGPT
zona pellucida
Zona pellucida is a glycoprotein layer that surrounds the plasma membrane of mammalian oocytes. This translucent structure plays a crucial role in several key events of reproductive biology, such as sperm binding and activation, prevention of polyspermia, and protection of the pre-implantation embryo. It also serves as a barrier that sperm must penetrate to fertilize the egg.
Wikidata
Zona pellucida
The zona pellucida is a glycoprotein membrane surrounding the plasma membrane of an oocyte. It is a vital constitutive part of the oocyte, external but of essential importance to it. The zona pellucida first appears in unilaminar primary oocytes. It is secreted by both the oocyte and the follicular cells. This structure binds spermatozoa, and is required to initiate the acrosome reaction. In the mouse, the zona glycoprotein, ZP3, is responsible for sperm binding, adhering to proteins on the sperm plasma membrane. ZP3 is then involved in the induction of the acrosome reaction, whereby a spermatozoon releases the contents of the acrosomal vesicle. The exact characterisation of what occurs in other species has become more complicated as further zona proteins have been identified. In humans, five days after the fertilization, the blastocyst performs zona hatching; the zona pellucida degenerates and decomposes to be replaced by the underlying layer of trophoblastic cells. The zona pellucida is essential for oocyte death and fertilization. In some older texts, it has also been called zona striata and stratum lucidum.
U.S. National Library of Medicine
Zona Pellucida
A tough transparent membrane surrounding the OVUM. It is penetrated by the sperm during FERTILIZATION.
Matched Categories
Numerology
Chaldean Numerology
The numerical value of Zona Pellucida in Chaldean Numerology is: 9
Pythagorean Numerology
The numerical value of Zona Pellucida in Pythagorean Numerology is: 4
Translations for Zona Pellucida
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"Zona Pellucida." Definitions.net. STANDS4 LLC, 2024. Web. 25 Apr. 2024. <https://www.definitions.net/definition/Zona+Pellucida>.
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