Navigation Links
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 (including hyaluronidase and acrosin) needed to penetrate the zona pellucida covering the ovum.

Acrosome reaction

When the sperm comes in contact with ZP3 in the zona pellucida, this reaction takes place, during which actin polymerizes to form the acrosomal process; also, the acrosomal vesicle fuses with the plasma membrane of the egg cell, and digestive enzymes are released from the sperm to digest the zona pellucida and give access to the egg.

See also



'"/>


(Date:9/22/2014)... image burn in Khabarovsk Krai, a territory occupying the coastline ... by plumes of smoke mark active fires. The smoke, which ... the Sea of Okhotsk. Taiga and tundra are ... the central depression, and deciduous forests are the natural vegetation ... Russia in the summer, the 2014 wildfire season appears to ...
(Date:9/22/2014)... could be much more useful in homes, if they ... see the world with cameras and lasers, which have ... are hidden in clutter. A complementary way robots can ... of small ultra-high frequency radio-frequency identification (UHF RFID) tags. ... an RFID-equipped robot to search a room for the ...
(Date:9/22/2014)... greater risk for stress-related diseases like type 2 ... new study by Brandeis University. , It,s long ... similar to the effects of illness or injury, ... part of our body,s healing response, runaway inflammation ... , In a recently published paper in ...
Breaking Biology News(10 mins):New RFID technology helps robots find household objects 2New RFID technology helps robots find household objects 3Obesity and stress pack a double hit for health 2
... majority of the abstracts to be presented at the EORTC-NCI-AACR [1] ... two weeks before the meeting at 00.01 hrs CET on Friday ... Journalists are free to report on the online abstracts from ... they should bear in mind that all the abstracts had to ...
... Richmond, Va. (Oct. 27, 2010) If you ... A recent study conducted by researchers from Virginia Commonwealth ... cancer patients who were eligible for genetic testing never ... relative,s life. The research, "Exploring Hereditary Cancer ...
... SHORES, Calif., Oct. 27 ... ... --> ... var first_result; // Results are keyed by longUrl, so we need to grab the first one. for (var r ...
Cached Biology News:Abstracts for the EORTC-NCI-AACR Symposium in Berlin go up online on Friday, Oct. 29 2Knowledge of genetic cancer risks often dies with patients, finds VCU Massey Cancer Center 2CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 2CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 3CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 4CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 5CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 6CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 7CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 8CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 9CIC Announces Upcoming Webinar: Insurance Consumer Expectations; Customer Experience & Self-Service Will Hit New Highs in 2011! The Role eSignatures Will Play in Meeting that Demand 10
Other biology definitionOther Tags