Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.

Anonymous asked in Education & ReferenceHomework Help · 1 decade ago

Science helppp pleassee ?!?

1) how does an increased level of estrogen in the blood effects the pituitary glad?

2) which hormones are at highest levels in the blood when the uterine lining is the thickest?

3) what appears to be the effect of the increased level of estrogen and progesterone on the secretion of the FSH?

4) what effect does the increased level of LH appear to have on the follicle?

1 Answer

  • 1 decade ago
    Favorite Answer

    I am not a hormone expert, so take this as a fast internet study to see just how much accurate information there is on the net for free:

    Your best website:

    I spent 30 minutes typing a giant summarization that was lost on the accidental browser back button. Direct answers are found there under the OVARY section under the EFFECT column.

    ANSWER FOR #1:

    (further explanation from this site below)

    Hormones LH & FSH (both pituitary hormones) control reproductive functioning and sexual characteristics. They stimulate the {ovaries} ovaries to produce estrogen and progesterone and the testes to produce testosterone and sperm.

    LH and FSH are known collectively as Gonadotrophins. LH is also referred to as Interstitial cell stimulating hormone (ICSH) in males.

    First of all, LH & FSH are part of the ANTERIOR pituitary gland.

    "Sex hormone binding globulin (SHBG) decreases the bioactivity of bound hormones by reducing the "free" (bioactive) fraction of the hormone. Persistent elevations of bioactive estrogen can interfere with follicular growth and can disrupt the midcycle preovulatory LH and FSH surges that are required for normal ovulation."

    My theory here is that "LH and FSH surges" refers to the pituitary gland, and their usage of the word "disrupt" is similar in "inhibit". Ultimately I theorize that this will cause abnormal, or 'decreased' ovulation.

    ANSWER FOR #2:

    I am going to theorize that Progesterone is highest because it "promotes the changes in the uterus that occur in preparation for the implantation of a fertilized ovum and prepares the breasts for milk production".

    Second highest would be Estrogen itself in my theory because it "facilitates growth of the tissues of the sex organs and other tissues related to reproduction. Estrogen also acts to strengthen bones and has a protective effect on the heart".

    ANSWER FOR #3:

    (Assuming this is continuing the context of female-related questions)

    Look at the figure in the section entitled "Control of Gonadotropin Secretion"

    Remembering that FSH stimulates the ovaries to produce the two hormones, I would say "superovulation", the section just above "Control of Gonadotropin Secretion"

    ANSWER FOR #4:

    My theory as to what comes closest to answering this question is in the section entitled "Granulosa" under the "Structure" section.

    This is a 13-page report I found based on the entire issue of follicles and proliferation.


    The best and most direct information I could find is located on this site with the section repeated below:

    What happens if the pituitary produces either too much or too little of these hormones?

    "An imbalance occurs, leading to more than a dozen disorders of the endocrine system. Deficiency of thyroid hormone, adrenal cortical hormone (cortisol) or antidiuretic hormone (vasopressin) is rapidly life-threatening. In patients with abnormalities of the other hormones, quality of life is significantly compromised."

Still have questions? Get your answers by asking now.