Normal sperm cells have an oval-shaped head with a cap-like covering called the acrosome. The acrosome contains enzymes that break down the outer membrane of an egg cell, allowing the sperm to fertilize the egg.
What is the function of the acrosome of the sperm quizlet?
The acrosome at the tip of the head contains digestive enzymes needed to penetrate (break into) an egg cell. The middle section is filled with mitochondria to provide the sperm with the energy it needs to travel a long distance to reach the egg cell. You just studied 4 terms!
What are the two functions of acrosome?
Mammalian sperm acrosomes perform two principal exocytosis-dependent functions: (i) to serve as a site for the sequestration and release of proteins required for binding to and penetration of the zona pellucida and, (ii) to enable the sperm to fuse with the oolemma.
What is the role of a sperm acrosome in fertilization?
The acrosome reaction that occurs after sperm capacitation, is an exocytotic event induced by a Ca++ influx. It plays an essential role during fertilization, by making spermatozoa able of penetrating the zona and capable of fusing with the egg plasma membrane.
What role does the acrosome play in fertilization quizlet?
What roles does sperm cell’s acrosome play in fertilization? The acrosome contains enzymes that help the sperm cell penetrate the protective coats of the oocyte.
What is the acrosome and what is its function quizlet?
An acrosome is a small protrusion that contains enzymes at the head of a sperm that functions to aid the sperm cell in penetrating the egg.
What enzymes are in the acrosome?
Acrosome Enzymes, the “Acrosome Reaction,” and Penetration of the Ovum. Stored in the acrosome of the sperm are large quantities ofhyaluronidase andproteolytic enzymes. Hyaluronidase depolymerizes the hyaluronic acid polymers in the intercellular cement that holds the ovarian granulosa cells together.
What is contained within the acrosome of the sperm?
In Eutherian mammals the acrosome contains degradative enzymes (including hyaluronidase and acrosin). These enzymes break down the outer membrane of the ovum, called the zona pellucida, allowing the haploid nucleus in the sperm cell to join with the haploid nucleus in the ovum.
What is the meaning of acrosome?
Definition of acrosome
: an anterior prolongation of a spermatozoon that releases egg-penetrating enzymes.
What do you mean by acrosome reaction and implantation?
The acrosome reaction must occur before the sperm cell reaches the zona pellucida. Acrosin digests the zona pellucida and membrane of the oocyte. Part of the sperm’s cell membrane then fuses with the egg cell’s membrane, and the contents of the head sink into the egg.
Where does the acrosome reaction occur quizlet?
These enzymes digest the Zona Pellucida surrounding the oocyte. One of the sperm cells manages to reach the plasma membrane of the oocyte, this triggers the acrosome reaction, allowing the the head of the sperm to fuse with the plasma membrane of the oocyte.
Which of the following describes a difference between how monozygotic and dizygotic twins develop?
Which of the following describes a difference between how monozygotic and dizygotic twins develop? Monozygotic twins come from a single zygote, while dizygotic twins come from two zygotes.
How do sperm and eggs differ quizlet?
Sperm: Produced in the Testicles of a male. Egg: Round shaped and consists of a large amount of cytoplasm before conception. Sperm: Oval head on the top and has a rigid middle with a slimly tail in the back to allow it to swim. Egg: Only a single egg cell is produced during once menstruation cycle.
