Reproductive Systems - Female Reproduction II

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Karteikarten am Reproductive Systems - Female Reproduction II, erstellt von J yadonknow am 05/04/2018.
J yadonknow
Karteikarten von J yadonknow, aktualisiert more than 1 year ago
J yadonknow
Erstellt von J yadonknow vor mehr als 6 Jahre
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Roles of oestrogen ova maturation Ova release release Transport of sperm from vagina to fertilisation site female 2' sex. chara Breast development in prep for lactation
Roles of progesterone Prep endometrium for fertilised embryo implantation Contributes to breast's ability to produce milk
Oogenesis oogonia 1' oocyte 2' oocyte ovum
Follicle development primordial follicle 1' follicle 2' follicle graafian follicle corpus luteum
Hormone release prior to puberty GnRH release from hypothalamus LH+FSH released from A.P.
What does this stim? (2) Stims ovaries to stim. follicular development Developing follicles then release oestrogen
Why growth spurt? ^ adrenal androgens
Menarche occurs When sufficient GnRH/LH/FSH present
Menstrual cycle - follicular phase 14/28 days Maturation of follicles Follicles produce Oestrogen
luteal phase Characterised by 28/28 Characterised by presence of corpus luteum
What does C.L. produce? progesterone and oestrogen
Hormonal changes during follicular phase ovarian hormones A.P. hormones
A.P. hormones explained FSH+LH ^ due to GnRH This stim. o release from follicle O stim. follicle development
What type of signalling is that? Autocrine - O + more O
Rising O inhibits FSH, tells A.P. follicle is developed enough Tonic LH remains the same
What other hormone inhibits O? Inhibin Peptide follicle hormone
How does O stim. O? By +FDBCK
Hormone feedback cycle Hypothalamus GnRH A.P. FSH/LH cells FSH/LH Ovary Follicular development Rising moderate O levels/ High O/ Inhibin
Luteal Surge High O stim. A.P. to produce large amounts of LH
Surge of LH causes follicle surge and release of oocyte from ovary
Oocyte then enters Oocyte enters oviduct and may/may not be fertilised
C.L. post fertilisation Produces O +progesterone This - LH/FSH release from A.P.
How long does it take or C.L. to degenerate to C.A.? ~10 days
Effect on FSH/LH No longer inhibited by prog + o, new cycle begins.
C.L. functions Release oestrogen for endometrium thickening Release progesterone for endometrium development and maintenance
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