What is the purpose of the acrosome reaction?
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 happens during an acrosomal reaction?
The acrosome reaction allows the sperm by exocytotic release of acrosomal enzymes to penetrate the zona pellucida of the egg. The species-specific zona pellucida protein that serves as a sperm receptor also stimulates a series of events that lead to fusion between the plasma membrane and outer acrosomal membrane.
What is the function of the acrosomal reaction in the sea urchin?
The acrosomal reaction in sea urchins Contact with egg jelly causes the exocytosis of the sperm’s acrosomal vesicle and the release of proteolytic enzymes that can digest a path through the jelly coat to the egg surface (Dan 1967; Franklin 1970; Levine et al. 1978).
What is the function of the acrosome 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 is the function of acrosome and head?
The function of the acrosome is to help the sperm get through the egg’s protective coat and allow the plasma membranes of the sperm and egg to fuse.
How does the enzymes of the acrosome help in fertilization?
What is the function of acrosome during fertilization quizlet?
The acrosomal reaction allows one sperm to penetrate the egg, but when the sperm cell unites with the egg plasma, it triggers the cortical reaction leads to a modification of the zona pellucida that blocks polyspermy; enzymes released by cortical granules digest sperm receptor proteins ZP2 and ZP3 so that they can no …
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 the function of acrosome Brainly?
The function of the acrosome reaction is to help the sperm get through the egg’s protective coat and to allow the plasma membranes of the sperm and egg to fuse.
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. You just studied 4 terms!
What is acrosome reaction quizlet?
acrosomal reaction. when the head of the sperm makes contact with the jelly coat of the egg, hydrolytic enzymes are released from the sperm cell that partially digest the jelly coat which enables the acrosomal process to attach to receptors on the egg cell, ensuring that fertilization occurs between the same species.
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.