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प्रश्न
A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.
Women experiences two major events in their life time one at menarche and the second at menopause. Mention the characteristics of both the events.
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उत्तर
Menarche:
- It is the first menstrual flow in a girl’s life.
- Occurs between age 11 to 13 years.
- Marks the beginning of reproductive phase.
- Indicates onset of puberty and ovulation begins.
Menopause:
- It is the permanent cessation of menstrual cycles.
- Occurs between age 45 to 50 years.
- Ovarian follicles stop responding to pituitary hormones.
- Ovulation and menstruation cease; fertility ends.
- Estrogen levels fall, causing physical and psychological changes.
APPEARS IN
संबंधित प्रश्न
Identify True/False statement. Correct false statement to make it true.
Menstrual cycle ceases during pregnancy.
the biological/technical terms for Fixing of developing zygote on the uterine wall.
Complete the following by filling in the blanks 1 to 5 with appropriate words:
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).
Explain menstrual cycle in human females.
Give appropriate terms for each of the following process:
Fixing of developing zygote (blastocyst) on the uterine wall.
Briefly describe the secretory phase of the menstrual cycle.
Explain the role of hormones during the menstrual cycle.
‘A proper understanding of the menstrual cycle can help immensely in family planning.’ Do you agree with the statement? Provide reasons for your answer.
Give Reasons
The chances of pregnancy to occur are most favourable on or about the 14th day of the menstrual cycle. Explain.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Menarche is the stoppage of menstruation.
Painful menstruation is termed as ____________.
Find the wrongly matched pair.
Expand the acronym.
FSH
The following is the illustration of the sequence of ovarian events (a-i) in a human female.
Explain the changes that occur in the uterus simultaneously in anticipation.
In humans, the menstrual cycle is generally of ______.
All occur during follicular phase of menstrual cycle, EXCEPT
On the fourteenth day of the menstrual cycle the female gamete released is _____.
Which set is similar?
Mainly which type of hormones control the menstrual cycle in human beings?
A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.
| HORMONE A | HORMONE B | |
| Subject 1 | Shows a peak on the 14th Day of the menstrual cycle. | Falls down during the luteal phase. |
| Subject 2 | Shows a peak on the 14th Day of the menstrual cycle. | The level is maintained high in the luteal phase. |
Which of the following statements is true about the subjects?
Define ovulation.
What are the events taking place in the ovary and uterus during follicular phase of the menstrual cycle.
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
Describe hormonal control in various phases of the menstrual cycle.
The figure show a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.
Spermatogenesis is induced by ______.
Which of the following statements are correct regarding female reproductive cycle?
- In non-primate mammals cyclical changes during reproduction are called oestrus cycle.
- First menstrual cycle begins at puberty and is called menopause.
- Lack of menstruation may be indicative of pregnancy.
- Cyclic menstruation extends between menarche and menopause.
Choose the most appropriate answer from the options given below:
