Acrosome

Evolutionary phenomenon in mice may explain human infertility

...s protein, resulting in instability of a cap-like structure, called the acrosome, present over the head of the sperm. This instability allows the acrosome to be shed from the sperm head to create a new surface essential for sperm to be capable of fusing with an egg. This is a natural process that can ta...

It is Men, and Not Women, to Be Blamed for Recurrent Pregnancy Loss

...litre) but is also capable of testing three other aspects. "Along with mobility and sperm count it allows three tests - hypo osmotic swelling, acrosome status and nuclear chromatin de-condensation - to stay assured about the competence of sperms leading to a healthy pregnancy." Misro claimed t...

Soya Found To Affect Women's Ability To Conceive: Professor

...perm to "burn out". Fraser, a professor of Reproductive Biology, said acrosome reaction generally took place as the sperm sheds a membrane as it "docked" with the egg. "If the acrosome reaction occurs before a sperm reaches an egg, then fertilisation is unable...

Acrosome in Biological News

Protein translation in sperm

...directs translation of nuclear-encoded genes in sperm, and that its inhibition leads to a marked decrease in sperm motility, actin polymerization, the acrosome reaction and in vitro fertilization rates. Thus, protein translation in sperm is essential for sperm functions that directly contribute to fertili...

Environmental chemical cocktail may sabotage sperm

..., the chemicals stimulated the sperm to undergo an acrosome reaction. This is when the cap on the head of the ...perm to penetrate the coverings of the egg. If the acrosome reaction happens before a sperm reaches the egg, t...bility to move was unaffected, but the spontaneous acrosome reaction meant that they were unable to fertilise ...

Acrosome in Biological Definition

Acrosome

In sperm cells of many higher animals, the acrosome develops over the anterior half of its head. It is a cap-like structure derived from the Golgi apparatus . In Eutherian mammals , acrosome formation is completed during testicular maturation. The acrosome contains digestive enzymes (i...

Acrosome

In sperm cells of many higher animals, the acrosome develops over the anterior half of its head. It is a cap-like structure derived from the Golgi apparatus . In Eutherian mammals , acrosome formation is completed during testicular maturation. The acrosome contains digestive enzymes (i...

Capacitation

..., the term "capacitation" has evolved in meaning and this should be taken into account when consulting sources. See also cortical reaction acrosome reaction Reference Beaudin, Stacey; Kipta, Donna; and Orr, Annamarie. (October 9, 1996). Current research into sperm capacitation: An Essa...

Sperm

... Schematic diagram of a sperm cell, showing the (1) acrosome , (2) cell membrane , (3) nucleus , (4) mitochondria , and (5) flagellum (tail) A sperm cell , or spermatozoon ( pl. spermatozoa ) (in ...

Spermatid

...o termed spermeteliosis ). The spermatids begin to grow a tail, develop a thickened mid-piece where the mitochondria become localised and form an acrosome . Spermatid DNA also undergoes packaging, becoming highly condensed. The DNA is packaged firstly with specific nuclear basic proteins, which are sub...

Spermatogenesis

... The Sertoli cell also reduces motility and capacitation (initiation of the acrosome reaction) of the sperm cells so viability is maintained. Spermatozoa are ...rude tails, repackage DNA into a head, cap the head with a lysosome-like acrosome and construct an energy transducing neck region of tightly packed mitocho...

Zona pellucida

...yte . This structure binds spermatozoa , and is required to initiate the acrosome reaction . The zona glycoprotein, ZP3 , is responsible for sperm binding...brane. There is evidence that ZP3 is then involved in the induction of the acrosome reaction, whereby a spermatozoon releases the contents of the acrosomal ve...

Acrosome in Biological Dictionary

Acrosome

The acrosome is an organelle that develops over the anterior half of the head in the spermatozoa (sperm cell) of many animals. It is a cap-like structure derived from the Golgi apparatus. Acrosome formation is completed during testicular maturation. In Eutherian mammals... During fertiliza...

Capacitation

...ish ... ROS are needed for capacitation and the acrosome reaction, the biochemical ... ,biological,bi...spermatozoa to undergo the zona pellucida-induced acrosome ... This is particularly true for studies on ... ... in mammalian sperm capacitation and the acrosome reaction ... polymerization occurs during capaci...

Acrosome reaction

...ore of a... diagram that shows the steps of a acrosome reaction as it happens in the Sea Urchin. ... acrosome reaction . Talk: acrosome . Human fertilization ... ...