Protection of female gametes from male gametes
Explain, how the male gametes go through the egg cell? How the female gametes guard itself from entry of more gametes after the first sperm cell?
Expert
Sperm cell which reaches the egg cell activates the acrosome reaction, a procedure where the hydrolytic enzymes of the acrosome are liberated on the external surface of zona pellucida (a protective layer that surrounds the egg cell). Portion of this layer is digested by acrosomal enzymes offering the sperm cell to arrive at the plasma membrane of the egg cell performing the fecundation.
At the moment, that sperm cell forms the contact with egg cell membrane a chemical alteration of this membrane takes place. Enzymes liberated by the exocytosis form the zona pellucida not capable to bind to other sperm cells and other male gametes are not able to enter the egg cell.
What is the position of thyroid gland in the body?
Customer Analysis: The Customer Analysis section of the business plan assesses the customer segments that the company serves. In it, the company must 1. Identify its target customers.2. Convey the needs of th
Define the term anoxia? Briefly explain it.
Name some diseases caused by abnormal GH secretion through hypophysis?
Data Recovery: Data recovery comprises restoring access to data which appears to be lost due to damage or failure of some kind of electronic data storage medium. There are different kinds of data recovery methods which might be employed in the event o
Write down the reticular fibers of connective tissue and where can they is found?
Barter Transactions: Barter is the one-on-one exchange of a service or product with other country, vendor or person. This is differentiated as a one-on-one trading system. In organized trading or barter companies, one trade their serv
What do you mean by immunoglobulins?
Explain how do plants control opening and the closing of the stomata?
Advantages of policy Guide to thinking and action: policies provide the framework within which managers have to make their decisions. Without them,
18,76,764
1942111 Asked
3,689
Active Tutors
1413676
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!