منابع مشابه
The C. elegans eggshell.
In all animals, oocytes are surrounded by an extracellular matrix upon fertilization. This matrix serves similar purposes in each animal. It functions to mediate sperm binding, to prevent polyspermy, to control the chemical environment of the embryo, and to provide physical protection to the embryo as it developes. The synthesis of the C. elegans matrix, or eggshell, begins when the oocyte ente...
متن کاملAre avian eggshell colours effective intraspecific communication signals in the Muscicapoidea? A perceptual modelling approach
PHILLIP CASSEY,* JOHN G. EWEN, N. JUSTIN MARSHALL, MISHA VOROBYEV, TIM M. BLACKBURN & MARK E. HAUBER Centre for Ornithology, School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK Institute of Zoology, Regents Park, London NW1 4RY, UK Vision, Touch and Hearing Research Centre, University of Queensland, Brisbane QLD 4072, Australia Optometry and Vision Science, Univer...
متن کاملEggshell Appearance Does Not Signal Maternal Corticosterone Exposure in Japanese Quail: An Experimental Study with Brown-Spotted Eggs
Reproduction is a critical period for birds as they have to cope with many stressful events. One consequence of an acute exposure to stress is the release of corticosterone, the avian stress hormone. Prolonged stress can have negative impacts on the immune system, resulting in, for example, increased oxidative stress. Through maternal effects, females are known to modulate their investment in e...
متن کاملNew insight in eggshell formation.
The matrix proteins that participate in crystalization fulfill important functions during the formation of the calcified tissues and contribute to the biomechanical properties of the mature product. We suggest that osteopontin (OPN) is part of an array of macromolecules synthesized and secreted by the cells adjacent to the mineralization front that self-assemble outside the cell and direct crys...
متن کاملHow an eggshell is made.
o a housewife an egg is an article of food, and its shell serves to protect it from physical damage and to prevent the entry of dirt and microorganisms. To the hen an egg is a potential chick, and the shell serves not only as a protective covering but also as a source of calcium for the embryo and as a membrane through which the embryo respires. The eggshell performs its various functions with ...
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ژورنال
عنوان ژورنال: Avian Biology Research
سال: 2015
ISSN: 1758-1559,1758-1567
DOI: 10.3184/175815515x14455297177037