... sperm and prevent them from traveling into the cervix. Other studies have found no connection to sperm transport or fertility. ... The "sperm wars" include both literal battles between sperm inside a woman's reproductive tract, as well as figurative battles ... "Sperm Wars - Robin Baker". robin-baker.com. "Sperm Wars: controversies and science - Robin Baker". www.robin-baker.com. Gallup ... Sperm Wars is a popular science book by evolutionary biologist Robin Baker about sperm competition. Originally published in ...
"Kinesin-dependent axonal transport is mediated by the sunday driver (SYD) protein". Cell. 103 (4): 583-94. doi:10.1016/S0092- ... "Entrez Gene: SPAG9 sperm associated antigen 9". Garg M, Kanojia D, Salhan S, Suri S, Gupta A, Lohiya NK, Suri A (2009). "Sperm- ... Jagadish N, Rana R, Mishra D, Kumar M, Suri A (Jun 2005). "Sperm associated antigen 9 (SPAG9): a new member of c-Jun NH2 - ... This gene which is abundantly expressed in testicular haploid germ cells encodes a protein that is recognized by sperm- ...
The method for SMGT uses the sperm cell, a natural vector of genetic material, to transport exogenous DNA. The exogenous DNA ... Sperm-mediated gene transfer (SMGT) is a transgenic technique that transfers genes based on the ability of sperm cells to ... Sperm-mediated gene transfer. Reproduction, Fertility and Development. 18:19-23. 4. Smith K, Spadafora C. 2005. Sperm-mediated ... In the absence of this inhibitory factor, DBPs on sperm cells are able to interact with DNA and can then translocate the DNA ...
... her eggs or the fertilising sperm. The non-fertilising sperm help the fertilising sperm by assisting their sexual transport or ... Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism (for species with two sperm types). Typically, only ... The infertile types may be large "carrier" types the fertile sperm attach to for transport, or "lancet" types. The lancet sperm ... Sperm heteromorphism is the simultaneous production of two or more distinguishable types of sperm by a single male. The sperm ...
Brannigan RE, Lipshultz LI (2008). "Sperm Transport and Capacitation". The Global Library of Women's Medicine. doi:10.3843/ ... Some sperm remains in cervical crypts, infoldings of the endocervix, which act as a reservoir, releasing sperm over several ... the mucus is thin and serous to allow sperm to enter the uterus and is more alkaline and hence more hospitable to sperm. It is ... These changes allow it to function either as a barrier or a transport medium to spermatozoa. It contains electrolytes such as ...
The second type, the helical spermbot, is a small helix structure which captures and transports single immotile sperm cells. In ... Single bull sperm cells enter these microtubes and become trapped inside. The tail of the sperm is the driving force for the ... At this location, the drug-loaded sperm is released by a spring mechanism and the sperm cell delivers the drug to the cancer ... Robotic sperm (also called spermbots) are biohybrid microrobots consisting of sperm cells and artificial microstructures. ...
Sperm typically cannot penetrate it.[citation needed] Saliva does not always exhibit spinnbarkeit, but it can under certain ... Mucociliary transport depends on the interaction of fibrous mucus with beating cilia. Clift, A. F. (1945). "Observations on ... Only such mucus appears to be able to be penetrated by sperm. After ovulation, the character of cervical mucus changes, and ... 2007). "Methods for studying mucociliary transport". Brazilian Journal of Otorhinolaryngology. 73 (5): 704-12. doi:10.1016/ ...
ISBN 978-1-4557-7016-8. Kierszenbaum, Abraham L.; Tres, Laura (2011). "Chapter 21: Sperm Transport and Maturation". Histology ... Nutrients help support sperm until fertilisation occurs; prostaglandins may also assist by softening mucous of the cervix, and ... La Vignera S (October 2011). "Male accessory gland infection and sperm parameters". International Journal of Andrology. 34 ( ... by causing reverse contractions of parts of the female reproductive tract such as the fallopian tubes, to ensure that sperm are ...
Hence, they rely on water currents to transport their gametes to the female organs - although their sperm are capable of " ... but produces sperm in spermatangia, and "eggs"(?) in carpogonium. A rather different example is Porphyra gardneri: In its ... or as avenues for cell-to-cell communication and transport in red algae, however little data supports this hypothesis. The ...
Winston: A white sperm whale who communicates with sonar. His archenemy is a giant squid called Old One-Eye. Ralph Robin: ... He sometimes helps the Suntots with transport and any tasks that require brute strength deep under water. Despite his pleasant ...
Profet M (September 1993). "Menstruation as a defense against pathogens transported by sperm". The Quarterly Review of Biology ... If it is fertilized by a sperm, the oocyte promptly matures into an ootid, which blocks the other sperm cells and becomes a ... If it is not fertilized by a sperm, the oocyte degenerates. The mature egg has a diameter of about 0.1 mm (0.0039 in), and is ... This hypothesis held that menstruation protected the uterus against pathogens introduced by sperm. Hypothesis 1 does not take ...
"Menstruation as a Defense Against Pathogens Transported by Sperm". The Quarterly Review of Biology. Chicago, Illinois: The ...
Profet M (September 1993). "Menstruation as a defense against pathogens transported by sperm". The Quarterly Review of Biology ... ISBN 978-0-465-03127-6. Profet M (September 1993). "Menstruation as a defense against pathogens transported by sperm". The ...
Nuclear autoantigenic sperm protein is a protein that in humans is encoded by the NASP gene. Multiple isoforms are encoded by ... This gene encodes a histone H1 binding protein that is involved in transporting histones into the nucleus of dividing cells. ... Welch JE, Zimmerman LJ, Joseph DR, O'Rand MG (1991). "Characterization of a sperm-specific nuclear autoantigenic protein. I. ... Batova I, O'Rand MG (1996). "Histone-binding domains in a human nuclear autoantigenic sperm protein". Biol. Reprod. 54 (6): ...
... it serves for transport of gases, nutrients and waste products around the body; it allows storage of sperm and eggs during ...
Profet M (September 1993). "Menstruation as a defense against pathogens transported by sperm". The Quarterly Review of Biology ...
They are used to transport sperm into the female ray. As male rays age and go into different maturity levels, their claspers ...
... it transports sperm from the epididymis in anticipation of ejaculation. In humans, the vas deferens routes up from the testicle ... In 1971, ten adult specimens of Podarcis sicula (the Italian wall lizard) were transported from the Croatian island of Pod ...
The cervical, uterine, and fallopian linings of the female reproductive system play a more important role in transporting sperm ... Most sperm have a single flagellum to help them swim. ... enables cells such as sperm to swim and others, such as ...
Vma21p coordinates assembly of the Vo subunits as well as escorting the Vo domain into vesicles for transport to the Golgi. The ... V-ATPases in the acrosomal membrane of sperm acidify the acrosome. This acidification activates proteases required to drill ... Malkus P, Graham LA, Stevens TH, Schekman R (November 2004). "Role of Vma21p in assembly and transport of the yeast vacuolar ... Rotation of the Vo domain transports the protons in movement coordinated with the V1 domain, which is responsible for ATP ...
Therefore, those who are missing both vas deferens are typically able to create sperm but are unable to transport them ... It may either be unilateral (CUAVD) or bilateral (CBAVD). The vas deferens connect the sperm-producing testicles to the penis. ... Their semen does not contain sperm, a condition known as azoospermia.[citation needed] Unilateral absence may not show any ... Individuals with CAVD can reproduce with the assistance of modern technology with a combination of testicular sperm extraction ...
... who studied the ultrastructure of sperm in these animals. They found that the sperm cells of T. lucenai have a single flagellum ... this could suggest that the mitochondria were supplying energy to the cell to aid in the transport to the female reproductive ... ultimately leading to the release of the sperm that were housed within. The process of sperm formation occurs in steps. The ... The elongation of the middle section of the sperm cell was associated with higher levels of mitochondria; ...
... was found produce sperm with a normal sperm count, albeit abnormally low sperm viability; whether he was sterile or not is ... However, transport of the mature spermatozoa through the remainder of the male reproductive system is achieved via muscle ... The non-motile spermatozoa are transported to the epididymis in testicular fluid secreted by the Sertoli cells with the aid of ... However, only about half or 100 million of these become viable sperm. The entire process of spermatogenesis can be broken up ...
It also localizes to the acrosomal membrane of the sperm, where it putatively mediates calcium ion transmembrane transport. The ... Liu B, Wang P, Wang Z, Zhang W (9 February 2011). "The use of anti-VDAC2 antibody for the combined assessment of human sperm ... Though all VDAC isoforms are ubiquitously expressed, VDAC2 is majorly found in the sperm outer dense fiber (ODF), where it is ... VDACs generally are involved in cellular energy metabolism by transporting ATP and other small ions and metabolites across the ...
They reproduce sexually, releasing eggs and sperm into the water during spawning. They are iteroparous, able to produce more ... Australian tubeworms are introduced to new habitat when they are transported on ship hulls, in ballasts, and on shells. ... They are filter feeders, gathering zooplankton, phytoplankton, and detritus particles from the water and transporting them to ...
"Methylxanthines stimulate calcium transport and inhibit cyclic nucleotide phosphodiesterases in abalone sperm". Developmental ... IH arises due to faulty calcium homeostasis, a closely monitored process, where slight deviations in calcium transport in the ... via two transport systems, a vitamin dependent mechanism and a vitamin independent mechanism. Within the vitamin-dependent ...
... maturation and transport of sperm cells. The epididymis is situated posterior and somewhat lateral to the testis. The ... It is involved in absorbing fluid to make the sperm more concentrated. The concentration of the sperm here is dilute. The body ... Because sperm are initially non-motile as they leave the seminiferous tubules, large volumes of fluid are secreted to propel ... Sperm entering the caput epididymis are incomplete-they lack the ability to swim forward (motility) and to fertilize an egg. ...
These open separately into the sperm duct or vas deferens and this stores the sperm. The vas deferentia then unite ... It is transported around the body by combined heart (posterior) and aorta (anterior) pulsations which are located dorsally just ... Sperm development is usually completed by the time the insect reaches adulthood. The male has two testes, which contain ... Making up usually less than 25% of an insect's body weight, it transports hormones, nutrients and wastes and has a role in ...
... or axoplasmic transport. In sperm, a testis-specific isoenzyme GAPDHS is expressed. Under normal cellular conditions, ... GAPDH also appears to be involved in the vesicle transport from the endoplasmic reticulum (ER) to the Golgi apparatus which is ... January 2013). "Vesicular glycolysis provides on-board energy for fast axonal transport". Cell. 152 (3): 479-491. doi:10.1016/j ... nuclear tRNA transport, DNA replication, and DNA repair. In addition, nuclear translocation of GAPDH has been reported in ...
... but their primary function is to mix and transport the sperm into the efferent ductules, where the major function is ... It appears the function of the rete testis is to mix the sperm as they leave the seminiferous tubules. Sperm leave the ... that carries sperm from the seminiferous tubules to the efferent ducts. It is the homologue of the rete ovarii in females. Its ... reabsorption of about 95% of the fluid, which increases the sperm concentration prior to entering the epididymis. Rete tubular ...