Advertisements
Advertisements
Question
How is polyspermy prevented in humans?
Solution
When a sperm comes in contact with the zona pellucida layer of the ovum, it induces changes in the membrane of the ovum to block the entry of additional sperms. This, thus, prevents the polyspermy and ensures that only one sperm can fertilise an ovum.
APPEARS IN
RELATED QUESTIONS
Fertilisation takes place in __________.
The zygote divides to form __________ which is implanted in uterus.
Name the hormones secreted and write their functions by corpus luteum and placenta (any two).
Name the hormones secreted and write their functions : during Follicular phase and parturition.
Name the stages in a human female where Corpus luteum and placenta co-exist.
Scientific term for the surgical removal of a section of fallopian tube.
Amount of yolk and its distribution are changed in the egg. Which one is affected?
In telolecithal egg, the yolk is found ______.
The finger-like projections that appear on the trophoblast following implantation, are called chorionic villi.
Where does the first cleavage division of zygote take place?
