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Human Reproduction — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYHuman Reproduction5 Marks
Question
Study the graph given below and answer the questions that follow:

Identify the ovarian phases during a menstrual cycle:

  1. 5th day to 12th day of the cycle.
  2. 14th day of the cycle.
  3. 16th day to 25th day of the cycle.
✓

Answer

  1. 5th day to 12th day of the cycle: Follicular phase (Proliferative phase).
  2. 14th day of the cycle: Ovulatory phase (release of ovum) followed by luteal phase.
  3. 16th day to 25th day of the cycle: Luteal phase.
  4. FSH is secreted by the anterior pituitary which stimulates the ovarian follicle to secrete estrogen, which in turn stimulates the proliferation of the endometrium of the uterine wall.

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