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प्रश्न
Given below is the diagram depicting the menstrual cycle in human beings. Study it carefully and answer the questions that follow.
- Which phases are indicated by ‘C’ and ‘D’?
- Name the structures labelled ‘F’. What is its role?
- Explain the changes in the level of progesterone during phases ‘C’ and ‘D’.
- Which hormone present in the urine confirms pregnancy in human beings?
- Identify the structure labelled ‘E’. Name the hormone released by it.
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उत्तर
- Phase C is the ovulation phase, while Phase D is the luteal phase.
- The Corpus Luteum is the structure identified with the label F. The Corpus Luteum produces progesterone, which promotes a healthy environment for the developing fetus.
- Progesterone levels are very low or negligible in phase C, while they are highest in phase D.
- The hormone present in the urine that confirms pregnancy in human beings is hCG [Human Chorionic Gonadotropin hormone].
- The structure labeled as 'E' is identified as a Graafian follicle, and the hormone released by it is estrogen.
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संबंधित प्रश्न
The human female gonads are ovaries. A maturing egg in the ovary is present in a sac of cells called ______ (1). As the egg grows larger, the follicle enlarges and gets filled with a fluid and is now called the ______ (2) follicle. The process of releasing the egg from the ovary is called ______ (3). The ovum is picked up by the oviducal funnel and fertilization takes place in the ______ (4). In about a weak the blastocyst gets fixed in the endometrium of the uterus and this process is called ______ (5).
What is menstrual cycle? Describe it in brief.
Explain the importance of cleanliness during the time of menstrual cycle in girls.
The menstrual cycle ceases during pregnancy.
Progesterone peaks during which phase of the menstrual cycle?
The temporary endocrine gland in humans is ______.
Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
Which one of the following statements is incorrect about menstruation?
The growth of corpus luteum is initiated by:
Name the following:
Two layers of the wall of uterus.
