click below
click below
Normal Size Small Size show me how
Physio Final pt 4
| Question | Answer |
|---|---|
| FSH is regulated by | - neg feedback - Inhibin |
| FSH stimulates.. | - Sperm production in testes - Follicular growth in ovaries |
| LH stimulates.. | Testosterone |
| Sertoli | - manages spermatogenesis - nourish developing sperm - phagocytize defective sperm - secrete androgen-binding protein and inhibin |
| Inhibin | - Negative feedback regulator |
| Leydig cells | Also make testosterone |
| Day 1 | Recruit growth of follicles - Only FSH is active |
| Day 7 | One follicle is chosen - Estrogen is building - Inhibin starts |
| Day 14 | Follicle is released - Progesterone levels start to increase |
| Day 15 | - the follicle cell surrounding the ovary is just left - renamed as the new hormone based on the 2nd cycle (corpus luteum) |
| LH allows the follicle to... | - become corpus luteum after 14 days - induces ovulation |
| Follicular phase | -Day 1-14 - Follicle is most important here |
| Luteal phase | - Day 14-28 - Inhibin is being secreted at levels that cause a negative feedback onto FSH release |
| Day 20 | - progesterone levels start to DECREASE - Inhibin keeps FSH shut off |
| Day 13 | - LH Surge occurs here |
| FSH is not needed for | Day 7-28 |
| LH is shut off on | Day 1-12 Day 15-28 |
| Day 28 | - No hormones from ovary - No support for uterus - Menses - bleeding phase of uterurs |
| Menopause | - Increase in FSH and LH |
| Testosterone acts as negative feedback to | - LH - GnRH |
| dihydrotestosterone | Most potent androgen |
| 5 alpha reductase | converts testosterone to dihydrotestosterone |
| uterine phases that occur at the same time as (during) the ovarian follicular phase? | - Proliferative - Menstrual |
| Estrogen and progesterone at a plasma concentration that is seen on ~ days 26 to 28 of a female cycle will cause | the hypothalamus to start to secrete GnRH and the anterior pituitary to secrete FSH |
| Testosterone | - Binds to receptors in Sertoli cells - Stimulates protein anabolism (growth) - Induces differentiation of male accessory reproductive organs and maintains their function |
| Day 7-14 | - Inhibin - Estrogen |