Definitions for vitelline membrane

This page provides all possible meanings and translations of the word vitelline membrane

FreebaseRate this definition:(0.00 / 0 votes)

  1. Vitelline membrane

    The vitelline membrane is a structure directly adjacent to the outer surface of the plasma membrane of an ovum. It is composed mostly of protein fibers, with protein receptors needed for sperm binding which, in turn, are bound to sperm plasma membrane receptors. The species-specificity between these receptors contributes to prevention of breeding between different species. It is called zona pellucida in mammals. As soon as the spermatozoon fuses with the ovum, signal transduction occurs, resulting in an increase of cytoplasmic calcium ions. This itself triggers the cortical reaction, which results in depositing several substances onto the vitelline membrane through exocytosis of the cortical granules, transforming it into a hard layer called the “fertilization membrane”, which serves as a barrier inaccessible to other spermatozoa. This phenomenon is the slow block to polyspermy.

U.S. National Library of MedicineRate this definition:(0.00 / 0 votes)

  1. Vitelline Membrane

    The plasma membrane of the egg.


Find a translation for the vitelline membrane definition in other languages:

Select another language:

Discuss these vitelline membrane definitions with the community:

Word of the Day

Would you like us to send you a FREE new word definition delivered to your inbox daily?

Please enter your email address:     


Use the citation below to add this definition to your bibliography:


"vitelline membrane." STANDS4 LLC, 2015. Web. 3 Mar. 2015. < membrane>.

Are we missing a good definition for vitelline membrane? Don't keep it to yourself...

The Web's Largest Resource for

Definitions & Translations

A Member Of The STANDS4 Network

Nearby & related entries:

Alternative searches for vitelline membrane:

Thanks for your vote! We truly appreciate your support.