20 Questions
How is the need to prolong luteal life accomplished in primates and humans?
By producing human chorionic gonadotropin (hCG)
What is the aim of the cortical reaction in fertilization?
To prevent polyspermy and activate egg metabolism
What triggers the secondary oocyte to resume and complete its second meiotic division?
Entry of the sperm nucleus into the cytoplasm of the secondary oocyte
What factor helps extend luteal life by producing estrogens in swine?
Estrogens
What does the zygote transform into after undergoing mitotic divisions and modifications?
Blastocyst
What is the main function of the ZP3 molecules in the zona pellucida?
To recognize integral proteins of the sperm plasmalemma
What is the role of the acrosomal enzymes released during the acrosomal reaction?
To digest the zona pellucida and propel the sperm toward the oocyte
How is the fusion between sperm and egg mediated?
By protein molecules fertilin in the sperm and integrins in the egg
Where is the perivitelline space located?
Between the zona pellucida and the oocyte cell membrane
What triggers the acrosomal reaction in sperm?
Integral proteins in the sperm plasmalemma
What is the main function of ZP3 molecules in the zona pellucida?
Recognition of integral proteins of the egg plasmalemma
What facilitates the fusion between the sperm and egg membranes?
Protein molecules fertilin in the sperm and integrins in the egg
What is the role of acrosomal enzymes released during the acrosomal reaction?
Digest the zona pellucida allowing sperm entry into the egg
Where is the perivitelline space located in relation to the oocyte?
Between the zona pellucida and egg plasmalemma
What triggers the acrosomal reaction in sperm?
Recognition of integral proteins of the egg plasmalemma by ZP3 molecules
What is the purpose of the cortical reaction during fertilization?
To prevent the occurrence of polyspermy and activate egg metabolism
What triggers the secondary oocyte to resume and complete its second meiotic division?
Entry of the sperm nucleus into the cytoplasm of the secondary oocyte
How is the need to prolong luteal life accomplished in swine?
By secreting estrogens with luteotropic action
What does the zygote transform into after undergoing mitotic divisions and modifications?
Blastocyst
What is the role of interferon-τ (IFNτ) in extending luteal life in cow and ewe?
To maintain the corpus luteum and act like LH
Test your knowledge about the main events of pregnancy, including fertilization, maternal recognition of pregnancy, implantation, embryonic development, and placentation. This quiz also covers the stages of fertilization such as contact and recognition between sperm and egg, regulation of sperm entry into the egg, fusion of genetic material, and cortical reaction.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
