Quiz 8 Flashcards
Within the female tract spermatozoa are lost and never reach the oviduct by several mechanisms. Name 2 of them.
- phagocytosis by neutrophils
2. retrograde transport
Where in the reproductive tract does sperm capacitation occur? What is capacitation? Why is it important?
Capacitation occurs in the uterus by estrogen in which the decapacitation coating on the sperm is removed so the sperm is capable of fertilizing the egg.
True or False
Sperm that move in the female reproductive tract through rapid transport, are capable of fertilizing an oocyte.
False, Sustained
True or False
Once sperms reach the uterine body, their motility pattern changes from linear to frenzied and dancing motion.
False, oviduct
True or False
Sialomucin has a low viscosity and helps sperm forward movement whereas Sulfomucin has a high viscosity and washes sperm out of the tract
True
True or False
In many species ZP1 and ZP2 are involved with initial binding (adhesion) of the sperm to the egg
False, ZP1 and ZP3
True or False
Looking through a microscope, Dino observed an embryo with too many blastomeres to be counted. This embryo must have been in the blastocyst stage.
False
True or False
Binding of the Egg surface protein (proacrosin) to the surface protein of the sperm (SP10) is essential for promotion of acrosome reaction
True
Define: Syngamy
the fusion of the male pronucleus to the female pronucleus to create a zygote.
Define: Zygote
the one celled embryo, forms from the male pronucleus and the female pronucleus fusing together
When looking under a microscope, you see something unique that the embryo contained three pronuclei. What has occurred to the embryo and why?
Polyspermy because it is a possibility that the vitelline block didn’t react fast enough to cause the release of cortical granules to kill the other sperm before they entered.
At what stage of embryo development once should recover the embryo for embryo transfer?
8-celled
What is the best embryo stage for cloning?
blastocyst
Name the two types of mucus produced by the cervix of the cow? Which one aids in sperm forward transport?
Sialomucin - aids in sperm forward transport
Sulfomucin
An orderly fusion of the spermatozoal the inner and the outer acrosomal membrane that enables the release of acrosomal enzymes is called _____ reaction. The released enzymes namely, _____ and _____, is important for spermatozoa penetration through the protein layer surrounding the oocyte called _____.
acrosomal
hyaluronidase
acrosin
zona pellucida
Where in the female reproductive tract does spermatozoa become hyperactive and what happens to the motility pattern?
Once sperms reach the oviduct, their motility pattern changes from linear to frenzied and dancing motion.
What is the role of the ZP2 and ZP3 during the fertilization and sperm binding to the egg?
ZP2 - holds the sperm to the egg
ZP3 - sperm binding to the Zona Pellucida
True or False
Decapacitation factor can be added to the sperm cells through the sperm maturation process in the epididymis
True
True or False
The one cell embryo is called morula
False
What is the vitelline membrane?
the membrane surrounding the oocyte
What is SP10?
Surface Protein of sperm
What is vesiculation?
Holes that develop at the points of fusion
