[permalink] [id link]
The zona pellucida, theca of follicle, antrum and liquor folliculi are also contained in the follicle.
from
Wikipedia
Some Related Sentences
zona and pellucida
* Cortical reaction, occurs when a sperm cell unites with the egg's plasma membrane, altering the zona pellucida which prevents other sperm from binding to and entering the egg
Included in the follicles are the cumulus oophorus, membrana granulosa ( and the granulosa cells inside it ), corona radiata, zona pellucida, and primary oocyte.
Then, a flat layer cell forms on the exterior of this cavity, and the zona pellucida, the blastocyst's barrier, remains the same size as before.
In 24 to 48 hours, the zona pellucida breaches.
Sperm activation has been shown to be caused by calcium ionophores in vitro, progesterone released by nearby cumulus cells and binding to ZP3 of the zona pellucida.
ZP3, one of the proteins that make up the zona pellucida, then binds to a partner molecule on the sperm.
Enzymes on the inner acrosomal membrane digests the zona pellucida.
After the sperm penetrates the zona pellucida, part of the sperm's cell membrane then fuses with the egg cell's membrane, and the contents of the head diffuse into the egg.
In order to prevent polyspermy and minimise the possibility of producing a triploid zygote, several changes to the egg's zona pellucida renders them impenetrable shortly after the first sperm enters the egg.
Prior to implantation, the embryo remains in a protein shell, the zona pellucida, and undergoes a series of cell divisions.
A morula ( Latin, morus: mulberry ) is an embryo at an early stage of embryonic development, consisting of cells ( called blastomeres ) in a solid ball contained within the zona pellucida.
zona pellucida -
zawag al -' urfi – zelophilia – zentai – ZIFT – zina – zipless fuck – zona pellucida – zooerasty – zoolagnia – zoophilia – zoophilia and health – zoosadism – Zoroastrian marriage customs – Zoroastrian wedding – zygote – zygote intra-fallopian transfer –
Further development and registrations of porcine zona pellucida or PZP, another immunocontraceptive targeted for feral horses, is supported by HSUS.
These enzymes break down the outer membrane of the ovum, called the zona pellucida, allowing the haploid nucleus in the sperm cell to join with the haploid nucleus in the ovum.
It is in this period or in some cases at the beginning of sexual maturity that the primary oocytes secrete proteins to form a coat called zona pellucida and they also produce cortical granules containing enzymes and proteins needed for fertilization.
Meiosis stands by because of the follicular granulosa cells that send inhibitory signals through gap junctions and the zona pellucida.
As the sperm approaches the zona pellucida of the egg, which is necessary for initiating the acrosome reaction, the membrane surrounding the acrosome fuses with the plasma membrane of the oocyte, exposing the contents of the acrosome.
After the cumulus layer is penetrated, the acrosomal enzymes begin to dissolve and the actin filament comes into contact with the zona pellucida.
Glycoproteins on the outer surface of the sperm then bind with glycoproteins on the zona pellucida of the ovum.
Acrosin digests the zona pellucida and membrane of the oocyte.
In the mouse it has been demonstarated that ZP3, one of the proteins that make up the zona pellucida, binds to a partner molecule ( to the β1, 4-galactosyl transferase receptors ) on the sperm.
* Female mammals – Vaccine of antigens ( derived from purified Porcine zona pellucida ) encapsulated in liposomes ( cholesterol and lecithin ) with an adjuvant, latest US patent RE37, 224 ( as of 2006-06-06 ), CA patent 2137263 ( issued 1999-06-15 ).
The main reasons are to prevent contamination with residual sperm adhered to the zona pellucida and to avoid unexpected fertilization failure.
zona and are
Traditionally, the two most common sites are the subthalamic nucleus ( STN ) and the globus pallidus interna ( GPi ), but other sites, such as the caudal zona incerta and the pallidofugal fibers medial to the STN, are being evaluated and showing promise.
There are different approaches to both steps, including mechanical, chemical ( Tyrode ’ s acidic solution ) and laser technology for the breaching of the zona pellucida, extrusion or aspiration for the removal of PBs and blastomeres, and herniation of the trophectoderm cells.
A hole is made in the zona pellucida and one or two blastomeres containing a nucleus are gently aspirated or extruded through the opening.
In rats, D < sub > 1 </ sub >- like receptors are present on the juxtaglomerular apparatus and on renal tubules, while D < sub > 2 </ sub >- like receptors are present on the renal tubules, glomeruli, postganglionic sympathetic nerve terminals, and zona glomerulosa cells of the adrenal cortex.
Pyknotic nuclei are often found in the zona reticularis of the adrenal gland.
There are four major zona pellucida glycoproteins, termed ZP1-4.
Molecules of various proteins are present in the outer layer of the follicles, homologous to the zona pellucida of the ovum.
Two of these regions that the APN is known to project to are the zona incerta and posterior thalamic nucleus.
Because the climate and soil of the zona da mata are excellent for the production of sugar cane, very little of the original Atlantic Rainforest vegetation remains.
Most of the major cities of northeastern Brazil, including Recife, Salvador, Maceió, Aracaju and João Pessoa, are located in the zona da mata.
The two parts are the zona hemorrhagica and zona cutanea, lined by stratified squamous non-keratinized and stratified squamous keratinized, respectively.
When porcine ( pig ) zona pellucida is injected into other mammals, antibodies are produced which attach to that animal's zona pellucida, preventing the sperm from attaching to the egg, therefore preventing fertilization.
The rural zones are divided in two sub-zones ; zona seca ( or dry zone ) and zona húmeda ( or humid zone ).
Other nuclei of the subthalamus are the zona incerta, thalamic reticular nucleus, and the fields of Forel.
zona and also
The zona fasciculata secretes a basal level of cortisol but can also produce bursts of the hormone in response to adrenocorticotropic hormone ( ACTH ) from the anterior pituitary.
Derivatives of the diencephalon also include the dorsally-located epithalamus ( essentially the habenula and annexes ) and the perithalamus ( prethalamus formerly described as ventral thalamus ) containing the zona incerta and the " reticulate nucleus " ( not the reticular, term of confusion ).
The thalamic complex is composed of the perithalamus ( or prethalamus, previously also known as ventral thalamus ), the mid-diencephalic organiser ( which forms later the zona limitans intrathalamica ( ZLI ) ) and the thalamus ( dorsal thalamus ).
Herpes zoster ( or simply zoster ), commonly known as shingles and also known as zona, is a viral disease characterized by a painful skin rash with blisters in a limited area on one side of the body, often in a stripe.
The zona pellucida ( plural zonae pellucidae, also egg coat ) is a glycoprotein membrane surrounding the plasma membrane of an oocyte.
In some older texts, it has also been called zona striata and stratum lucidum ( not to be confused with the stratum lucidum of the skin ).
The intermediate and deep layers also receive input from the spinal trigeminal nucleus, which conveys somatosensory information from the face, as well as the hypothalamus, zona incerta, thalamus, and inferior colliculus.
Bedford's paper also stated that human spermatozoa would not even attach to the zona surface of non-hominoid primates ( baboon, rhesus monkey, and squirrel monkey ), concluding that although the specificity of human spermatozoa is not confined to man alone, it probably is restricted to the Hominoidea.
0.147 seconds.