Flashcards in Female Reproductive System Deck (20)
What is the X-Chromosome?
-carries a lot of genetic information
-mutations here cause sex-linked disorders which are usually recessively inherited so females express these disorders far less than males
-produce estrogen and progesterone
-contain follicles that contain/nourish/protect immature ova
contains an ovulated egg that has yet to be drawn into the fallopian tubes
the production of female gametes
All oogonia a woman will ever have are formed during _______ _________.
-name of oogonia at birth that have already undergone DNA replication
-cells are 2n
-arrested in this form in prophase 1 until menarche
What happens to the oocyte during menarche?
one oocyte per month will complete meiosis 1 and become a secondary oocyte and a polar body
-result from completion of meiosis 1
-contains nearly all the cytoplasm
-remains arrested in metaphase 2 unless fertilization occurs
What happens when a secondary oocyte is fertilized?
the oocyte completes meiosis 2 and splits into a mature ovum and another polar body via 2nd meiotic division
-consists of large quantities of cytoplasm and organelles
-contributes almost everything to the zygote including 1/2 of DNA, all of the cytoplasm, organelles (including the mitochondria), RNA and physical space
What does sperm contribute to a zygote?
1/2 of DNA
-formed upon completion of meiosis 2 when the haploid pronuclei of the sperm and ovum join
Ovaries are derived from the same embryonic structures as the ______.
-secreted in response to FSH
-results in development/maintenance of female reproductive system
-initially thickens the endometrium
-secreted by the corpus luteum in response to LH
-involved in development/maintenance of endometrium
-by end of first trimester it is secreted by the placenta
What are the phases of the menstrual cycle?
-vascularization and glandularization of endometrial lining
-immediate decrease then increase estrogen
-egg released from follicle into peritoneal cavity
-large spike in LH
-corpus luteum produces progesterone to maintain endometrium