12th Class Biology Sample Paper Biology Olympiad Sample Paper-3

  • question_answer
    During bleeding phase of menstrual cycle unfertilized secondary oocyte undergoes, autolysis. The interplay of hormones then is                                   

    A)  Progesterone and estrogen continue the hypertrophy of endometrial lining

    B)  Prolactin and progesterone reduce LH level causing regression of corpus luteum

    C)  Progesterone inhibits the release of LH from pituitary causing regression of corpus luteum

    D)  Prolactin and estrogen inhibit progesterone secretion leading to sloughing off of uterine lining.

    Correct Answer: C

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