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Flashcards · Biology · The Endocrine System

The Menstrual Cycle

17 cards

  1. What does FSH do?

    Makes an egg mature and stimulates the ovary to release oestrogen.

  2. What does LH do?

    A surge causes ovulation.

  3. What does oestrogen do?

    Repairs and thickens the lining of the uterus.

  4. What does progesterone do?

    Maintains the lining of the uterus.

  5. What does testosterone do?

    Controls male secondary sexual characteristics and sperm production.

  6. Where are FSH and LH released from?

    The pituitary gland.

  7. Where are oestrogen and progesterone released from?

    The ovaries.

  8. How long is the menstrual cycle?

    About 28 days.

  9. What happens on days 1 to 5?

    Menstruation: the lining of the uterus breaks down.

  10. What happens on day 14?

    Ovulation.

  11. What is ovulation?

    The release of a mature egg from an ovary.

  12. What happens to the lining after ovulation?

    It is maintained by progesterone.

  13. What does oestrogen do to FSH? (Higher tier)

    A rising level stops the pituitary releasing FSH.

  14. What triggers the LH surge? (Higher tier)

    A high level of oestrogen.

  15. What makes the lining break down? (Higher tier)

    The progesterone level falls.

  16. A hormone graph with a marker X on the curve that peaks at day 14. Name the hormone shown by the curve marked X.

    LH. The surge of LH at day 14 causes ovulation.

  17. A hormone graph with the curves not named. Match each curve to a hormone and say what each does. The same graph with each curve named.

    FSH matures an egg. LH has the peak at day 14 and causes ovulation. Oestrogen repairs the lining. Progesterone rises after ovulation and maintains the lining.