Class Notes (839,483)
Canada (511,363)
Biology (91)
BIL 118 (28)

structure of egg

2 Pages

Course Code
BIL 118
O' Sullivan

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Structure of the Egg  0.1mm (100um) in diameter. Sperm's head is only 2.5um across  Haploid nucleus is surrounded by cytoplasm / with enzymes and organelles  Yolk droplets contain proteins and lipids  Outside plasma membrane is a glycoprotein coat called a jelly coat Acrosome Reaction and Penetration of the Oocyte Membrane  Acrosome reaction o Contact of jelly coat and sperm o Triggers Ca2+ to enter membrane of sperm o Causes acrosome to burst / releases enzymes / digest jelly coat  // enzymes: hyluronidase + acrosin o Sperm filament attaches to receptor on vitelline membrane o Sperm and egg plasma membranes fuse o Sperm nucleus enters egg, tail and middle piece remain outside  Depolarisation of membrane / blocks entry of more sperm  2° oocyte undergoes 2nd division of meiosis / produces ovum + second polar body  Nuclei (ovum + sperm) fuse forming a zygote Female Infertility  Pituitary gland fails to pro
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.