Hormone Description FSH LH estrogen progesterone

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Presentation transcript:

Hormone Description FSH LH estrogen progesterone Made by the pituitary gland Promotes the development of follicles in the ovary LH Made in the pituitary gland Promotes ovulation & the formation of the corpus luteum estrogen Made by developing follicle and corpus luteum in the ovary Promotes thickening of the uterus lining progesterone Made by the corpus luteum Maintains the thickened uterus lining

FSH from pituitary stimulates development of a follicle. Follicle in the ovary develops & secretes estrogen. Estrogen promotes thickening of the uterus lining Uterus lining thickens LH ‘spike’ causes ovulation Corpus luteum forms from empty follicle Corpus luteum makes Progesterone and estrogen Uterus lining continues to thicken and maintains thickness Corpus luteum degenerates & stops making hormones Low levels of estrogen and progesterone cause menstruation

Explained simply: Negative feedback Is a control process where the response to a stimulus reduces that stimulus. LH is produced by pituitary (stimulus) promotes the formation of the corpus luteum corpus luteum then produces progesterone (response) progesterone inhibits LH secretion

Hormone Description FSH LH estrogen progesterone Made by the pituitary gland Promotes the development of follicles in the ovary Promotes estrogen secretion by the follicle cells LH Made in the pituitary gland Promotes ovulation & the formation of the corpus luteum Promotes estrogen secretion by the developing follicle estrogen Made by developing follicle and corpus luteum in the ovary Promotes thickening of the uterus lining Inhibits secretion of FSH Stimulates pituitary to secrete LH progesterone Made by the corpus luteum Maintains the thickened uterus lining Inhibits secretion of LH & FSH

Is a control process where the response to a stimulus increases that Explained simply: Positive feedback Is a control process where the response to a stimulus increases that stimulus. LH is produced by the pituitary gland. LH causes follicle cells to make estrogen. Estrogen promotes production of LH. LH produced increases. This LH production continues to increase until ovulation – then follicle cells become the corpus luteum and make progesterone which inhibits LH production.