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:4/20/2015)... , April 20, 2015 Huntington Memorial Hospital ... to implant a new miniaturized, wireless monitoring sensor to ... the first and only FDA-approved heart failure monitoring device ... when used by physicians to manage heart failure. ... is implanted in the pulmonary artery (PA) during a ...
(Date:4/20/2015)... , April 20, 2015 The ... Glenbeigh Records Management (GRM), Ireland,s ... Dubai Islamic Bank. Having built up an impressive track record ... a leading player within the records management sector in ... to double is GCC staffbase and employ a further eight ...
(Date:4/17/2015)... 17, 2015 Increasing ... technological advancement to drive biometric systems market in ...   According to a recently released ... &  Opportunities, 2020 ", biometric systems market in ... growth at CAGR of over 22% through 2020. ...
Breaking Biology News(10 mins):Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 2Huntington Memorial Hospital Becomes First in the San Gabriel Valley to Offer Patients a New Heart Failure Monitoring Solution 3Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 2Glenbeigh Records Management Wins Contract With Dubai Islamic Bank 3Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 2Saudi Arabia Biometric Systems Market to Grow at 22% Through 2020, Says TechSci Research 3
... A study that relates global energy use to economic ... , finds strong correlations between these two measures both ... leads the study,s authors to infer that energy use ... increase in energy supply will be required to meet ...
... French . Scientists have discovered direct evidence of ... ammonites, distant relatives of squids, octopuses and cuttlefishes. The discovery ... 65.5 million years ago, at the end of the Cretaceous. ... fossils but until now, there has been no experimental evidence ...
... native perennials instead of corn in the Midwest,s rolling ... University research suggests. Federal mandates and market forces ... biologist Bruce Robertson says, but the environmental consequences of ... are a serious concern. Ethanol in America is ...
Cached Biology News:Study finds energy limits global economic growth 2Ammonites' last meal: New light on past marine food chains 2Ammonites' last meal: New light on past marine food chains 3Biofuel grasslands better for birds than ethanol staple corn, researchers find 2
Other biology definitionOther Tags