13131039
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
about 6 years ago
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| Question | Answer |
| 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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