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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.
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संबंधित प्रश्न
Uterus, Parturition, Fertilisation, Gestation, Implantation.
the Biological/technical term for Complete stoppage of menstrual cycle in females
Mention one significant difference between Hormones of ovulatory phase and hormones of luteal phase
Explain menstrual cycle in human females.
Define the following term :
Ovulation
Sketch the labelled diagram.
Menstrual cycle
Observe the figure and answer the questions given below.
a) What does the above figure indicate?
b) Which human organs are involved in this process?
c) Name the hormones responsible for this process.
d) After how many days these repetitive changes take place?
e) ‚A woman should stay away from others, as her body is impure during this process.‛ What is your opinion about this statement? Elaborate it.
‘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
Missing of menses is the first indication of pregnancy.
Name the Following
The term used when females stop menstruation at the age of 45-50 years.
Complete the following sentences with appropriate word:
The human gestation period is about ____________.
Menstruation begins due to ______.
Match the Columns.
| Column I | Column II | ||
| i. | Proliferative phase | a. | Breakdown of the endometrial lining |
| ii. | Secretory phase | b. | Follicular phase |
| iii. | Menstruation | c. | Luteal phase |
Calculate the number of spermatozoa produced by a single primary spermatocyte.
Choose the correct order of phases of the menstrual cycle.
All occur during follicular phase of menstrual cycle, EXCEPT
Calculate the expected date of ovulation, if in a normal menstruating woman, gets her menses on 5th April.
In the human female, menstruation can be deferred by the administration of ______.
Corpus luteum ______.
Mature Graafian follicle is generally present in the ovary of a healthy human female around stet ______.
Which one of the following statements is incorrect about menstruation?
Which one of the following events is correctly matched with the time period in a normal menstrual cycle?
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. |
If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?
The main function of mammalian corpus luteum is to produce ______.
Why are menstrual cycles absent during pregnancy?
Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormones responsible for the events shown.
What is the average duration of the menstrual cycle?
On approximately which day of the menstrual cycle does ovulation occur?
What groups of animals exhibit the menstrual cycle?
