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प्रश्न
Explain the menstruation phases in the menstrual cycle of a human female.
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उत्तर
- During menstruation, the uterine lining, known as the endometrium, sheds along with blood vessels and tissue debris.
- If fertilization does not occur, this process is started by a reduction in estrogen and progesterone.
- Menstruation is the start of the menstrual cycle and usually lasts 3-7 day.
संबंधित प्रश्न
Give appropriate terms for each of the following process:
Fixing of developing zygote (blastocyst) on the uterine wall.
What is menstrual cycle? Describe it in brief.
What is the menstrual cycle?
What are the phases of the menstrual cycle? Indicate the changes in the ovary and uterus.
Which one of the following events occurs during the secretory phase of the menstrual cycle?
Menstruation is triggered by a sudden decline in the amount of hormone secreted by corpus luteum. Identify the hormone.
Exit from the cell cycle and remain dormant for long time by a cell is represented by one of the following phases of the cell cycle:
In the figure given below, parts A and B show the level of hormones which influence the menstrual cycle. Study the figure and answer the questions that follow:
- Name the organs which secrete the hormones represented in parts A and B.
- State the impact of the hormones in part B on the uterus of the human female during 6 to 15 days of the menstrual cycle.
What is the average duration of the menstrual cycle?
What groups of animals exhibit the menstrual cycle?
