17 Questions
What is the main process of formation of haploid gametes from primordial germ cells?
Gametogenesis
What is the term for the primordial cells that give rise to gametes?
Primordial germ cells
Where do primordial germ cells differentiate into oogonia during prenatal development?
Ovary
At what stage of development do oogonia undergo mitotic division and enlarge to form primary oocytes?
During the fifth month of intrauterine life
What is the term for the unit consisting of a primary oocyte surrounded by flat epithelial cells?
Primordial follicle
What is the period of time during which oogenesis occurs?
Before birth to menopause
What is the primary reason for primary oocyte arrest at diplotene stage of prophase I of meiotic cell division?
Due to OMI secreted by follicular cells
What is the term for the degeneration of many oogonia as well as primary oocyte, except in the cortical region?
Atresia
What type of epithelium is formed from the granulosa cells?
Stratified epithelium
What is the layer surrounding the follicle that divides into an outer fibrous layer and an inner secretory cell layer?
Theca folliculi
How many primordial follicles start to mature in each month from each ovary after menarchy?
15-20
What is the term given to the follicle when the fluid-filled spaces between the granulosa cells merge to form a single cavity?
Secondary follicle
What is the fate of the follicles that do not enter the tertiary stage?
They undergo atresia
In which stage of meiosis does the secondary oocyte arrest before ovulation?
Metaphase II
What is the structure formed by the follicular cells surrounding the antrum?
Membrana granulosa
What is the result of the completion of meiosis II in the absence of fertilization?
The degeneration of the oocyte
How many polar bodies are formed at the end of oogenesis?
3
Test your knowledge of oogenesis, the process of formation of haploid gametes from primordial germ cells, and gametogenesis, including its definition, phases, and changes during prenatal and postnatal development. Learn about the ovarian and uterine cycles and more!
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