Acrosome

In order to accomplish this the head of each sperm called the acrosome contains a packet of shell-dissolving enzymes—released when contact with the egg is made. ❋ Niels H. Lauersen (2000)

As researchers from the University of Illinois explain it, normal sperm are composed of a cap-like structure that surrounds the anterior end of the sperm head called the acrosome. ❋ Unknown (2012)

The acrosome is a large membrane-limited granule that overlies the nucleus of mature sperm ❋ Unknown (2009)

The acrosome is the packet of enzymes in the sperm’s head that produces enzymes to facilitate penetration of the egg. ❋ Mark L. Fuerst (2010)

If sperm undergo the acrosome reaction too early, before they contact the egg, they are incapable of fertilization. ❋ Mark L. Fuerst (2010)

So if the majority of sperm undergo the acrosome reaction on exposure to Viagra, the drug may significantly impair their fertilizing potential. ❋ Mark L. Fuerst (2010)

However, the amount of Viagra at concentrations equivalent to what a man would have thirty minutes after taking the maximum recommended 100 milligram dose leads to early activation of the acrosome reaction. ❋ Mark L. Fuerst (2010)

The acrosome reaction is the chemical change that enables a sperm to penetrate an egg. ❋ Mark L. Fuerst (2010)

They found that while the Viagra-bathed sperm became more active, they also suffered damage to the structure at their heads known as the acrosome. ❋ GreenFertility (2008)

The acrosome reaction mediated by recombinant protein was independent of Gi protein-coupled receptor pathway, required extra cellular calcium and involved both T - and L-type voltage operated calcium channels. ❋ Anasua Ganguly (2010)

Many key biochemical reactions in sperm depend on intracellular pH levels, including its initial activation, hyperactivation once near the fallopian tubes and the acrosome reaction, in which enzymes are released to penetrate the egg. ❋ Unknown (2010)

In fact, many key biochemical reactions in sperm depend on intracellular pH levels, including its initial activation, hyperactivation once near the fallopian tubes and the acrosome reaction, in which enzymes are released to penetrate the egg. ❋ Unknown (2010)

Only after the capacitation is completed can the spermatozoa respond to the oocyte interaction with the exocytosis of acrosome content, the acrosome reaction (AR). ❋ Unknown (2010)

Covered by a cap-like structure called (acrosome) = acrosomic cap = galea capitis. ❋ Saktivinayaga (2010)

 The acrosome contains enzymes that help in penetration of the spermatozoon into the ovum during fertilization ❋ Saktivinayaga (2010)

Maturation and Capacitation of Spermatozoa (continue) • Acrosome reaction: When spermatozoon becomes in contact with the zona pellucida, changes take place in the membrane of the acrosome and enable the release of lysosomal enzymes. ❋ Saktivinayaga (2010)

Fig. 2 show that cells collected from the cauda epididymidis had a normal aspect and an apparently unaltered acrosome. ❋ Unknown (2009)