Your replies can/should be brief (choosing which word is correct is sufficient f

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Your replies can/should be brief (choosing which word is correct is sufficient for many of these)

For questions 4-10, refer to figure 52.16 as much as possible. Try to interpret that figure's info in order to answer these questions. THEN read in the text if necessary 4. What pituitary hormone stimulates follicle development in the ovary (hint - its name implies this)? Follicle stimulating hormone (FSH) 5. What hormone is produced by the developing follicle? ol delin mieyele (ahuman iemal ycle 6. Why does 7. What pituitary hormone, released in HUGE quantities, stimulates ovulation and release of an "egg" from the follicle? 8. What ovarian structure produces progesterone? 9. Does progesterone inhibit or stimulate the pituitary gland's hormones (FSH in particular)? 10. Why/how does the introduction of progesterone during the first 14 days of a (human female's) cycle prevent pregnancy (consider your reply to #9 and how the ovary will be affected)? 11. Do progesterone levels increase or decrease when the corpus luteum/CL dies? 12. Does this change in progesterone make the endometrium get thicker or thinner/lost?

Explanation / Answer

5. ESTROGEN (secreted by developing follicles/corpus leuteum).

6. Estrogen level decrease because -

7. LH (Luteinizing Hormone). The sharp increase in LH that cause ov5 is called as LH Surge.

8. Corpus Leuteum (which is developed from follicular cells post.ovulation).

9. Progesterone INHIBIT FSH (by negative feedback progesterone decrease levels of GnRH which decrease FSH and LH).

10. Progesterone by neg4 feedback on GnRH decrease it's level. Decreased GnRH decrease FSH and LH which are stimulus for development of ovum.

11. Progesterone DECREASES (as it is synthesised by corpus luteum)

12. Normal functions of progesterone is thickening of endometrium for pregnancy(if it occurs). So it's decrease will cause Thinning/loss of endometrium.

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