Template:BGDA Practical 3 - Oogenesis and Ovulation Interactive: Difference between revisions
From Embryology
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|| Oogonia are the small diploid cells (germ cells) that proliferate by mitosis only during the fetal period. Therefore all oocytes are produced in the female ovary before birth. | || Oogonia are the small diploid cells (germ cells) that proliferate by mitosis only during the fetal period. Therefore all oocytes are produced in the female ovary before birth. | ||
{Oocytes in follicles enter prophase 1 of meiosis and are arrested at the diplotene stage. Which of the following block the further stages of mitosis? | |||
|type="()"} | |||
+ follicular stimulating hormone (FSH) | |||
- leutenising hormone (LH) | |||
- cyclic AMP (cAMP) secreted by follicles | |||
- androgens | |||
- Oestrogens | |||
|| In mammalian oocytes cyclic AMP (cAMP) secreted by follicles maintains meiotic arrest by inactivation of maturation promoting factor (MPF) and by stimulating cAMP-dependent protein kinase A (PKA). [https://www.ncbi.nlm.nih.gov/pubmed/26926596 PMID 26926596] | |||
</quiz> | </quiz> |