• In normal (natural or standard in vitro ) fertilization, many sperm penetrate the corona radiata of the ovum (a layer of follicle cells surrounding the ovum). (robertpgeorge.com)
  • 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. (wikipedia.org)
  • As it is swept along the distal uterine tube, the oocyte encounters the surviving capacitated sperm, which stream toward it in response to chemical attractants released by the cells of the corona radiata. (lumenlearning.com)
  • The sperm first burrow through the cells of the corona radiata. (lumenlearning.com)
  • How do sperm penetrate the corona radiata? (lumenlearning.com)
  • Role in fertilization In mammalian fertilization, hyaluronidase is released by the acrosome of the sperm cell after it has reached the oocyte, by digesting hyaluronan in the corona radiata, thus enabling conception. (vidque.com)
  • The digestive enzymes released by this reaction digest the extracellular matrix of the corona radiata. (lumenlearning.com)
  • The corona radiata is an outer layer of follicular (granulosa) cells that form around a developing oocyte in the ovary and remain with it upon ovulation. (lumenlearning.com)
  • The oocyte is surrounded by cumulus cells (also termed the corona radiata) from the follicle and spermatozoa must break through this outer layer to reach the oocyte itself (Figure 10.3). (pediagenosis.com)
  • Unfortunately, due to logging, burning, grazing, and habitat conversion to Pinus radiata plantations, Araucaria araucana is listed as an endangered species by CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora). (photoseek.com)
  • In Chile, most of the timber industry depends on Monterey pine ( Pinus radiata (D. Don. (biomedcentral.com)
  • The vitelline envelope or zona radiata (ZR) is first seen at the lipid globule stage I as a discontinous layer. (csic.es)
  • Dovrebbe essere Hogna radiata, in base alle dimensioni (corpo sui 2,5 cm e legspan oltre i 7 cm), alle bande radiali del prosoma ed al pattern oculare. (aracnofilia.org)
  • The exact characterisation of what occurs in other species has become more complicated as further zona proteins have been identified. (wikipedia.org)
  • Mi piacerebbe incontrare una Lycosa, ma finora non ho avuto ancora questa fortuna, forse a queste quote (1000 m) e nella zona del Potentino non sono molto facili da rinvenire. (aracnofilia.org)
  • Raven este o combinatie de uleiuri esentiale cu un puternic efect calmant, care poate ameliora durerile atunci cand se aplica local in zona toracelui si pe gat sau cand este raspandit prin pulverizare. (minuneanaturii.ro)
  • The zona pellucida is surrounded by the corona radiata. (wikipedia.org)
  • The zona pellucida is covered externally by the corona radiata, which is a loose investment of granulosa cells from the ovarian follicle. (ehd.org)
  • The ovum is enclosed within a thick, transparent envelope, the zona striata or zona pellucida, adhering to the outer surface of which are several layers of cells, derived from those of the follicle and collectively constituting the corona radiata. (pubannotation.org)
  • The zona pellucida is seen as a thick clear girdle surrounded by the cells of the corona radiata. (pubannotation.org)
  • It is not yet determined whether the zona striata is a product of the cytoplasm of the ovum or of the cells of the corona radiata, or both. (pubannotation.org)
  • Runt äggcellen finns ett membran av granulosaceller som kallas corona radiata, som skyddar äggcellen. (drake.nu)
  • MEDICAL ANIMATION TRANSCRIPT: El huevo está cubierto por una capa de células llamada corona radiata. (smartimagebase.com)
  • Cumulus oophorus, membrana granulosa corona radiata, zona pellucida, and primary oocyte are included in the follicles. (eagetutor.com)
  • The cytoplasm, which contains nutritional substances, and three membranes: the vitaline membrane, the zona pellucida and the corona radiata. (wikiteka.com)
  • In normal fertilization, many sperm penetrate the corona radiata of the ovum (a layer of follicle cells surrounding the ovum). (utsfl.ca)
  • What must occur in order for sperm to penetrate the zona pellucid? (freezingblue.com)
  • Fertilizing spermatozoa must penetrate the zona, but we do not know the exact mechanisms underlying this process. (edu.au)
  • Surprisingly, mutant male hamsters were completely infertile because their spermatozoa were unable to penetrate the zona. (edu.au)
  • 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. (wikipedia.org)
  • The diameter of such a mammalian cell, including its zona, ranges from 70 to 190 μm. (ehd.org)
  • this affects the cytoplasm more than the zona, so that a subzonal (or perivitelline) pace becomes accentuated. (ehd.org)
  • What is the embryo called when fluid begins to leak through the zona pellucid and form a cavity? (freezingblue.com)
  • It is deep cardiac branches of a process about xht zona radiata is entitled to tho embryo. (kitchentablecult.com)
  • the cells are radially arranged around the zona, those of the innermost layer being columnar in shape. (pubannotation.org)
  • In the human, the ooplasm measures about 100 μm, and the thickness of the zona ranges from 16 to 18 μm (Allen et al. (ehd.org)
  • Fish zona radiata (eggshell) protein: a sensitive biomarker for environmental estrogens. (nih.gov)
  • Äggcellen bildas genom meios i äggstockarna, en process som kallas oogenes. (drake.nu)