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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
Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase.
Name the function of the following:
Corpus luteum
Uterus, Parturition, Fertilisation, Gestation, Implantation.
Give a significant point of difference between the oestrous and menstrual cycles.
‘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 onset of menstruation in a young girl at about the age of 13 years.
Name the Following
Sloughing of the uterine wall during menstrual flow.
Name the Following
The term used when females stop menstruation at the age of 45-50 years.
Describe the structure of a Graafian follicle.
Explain the importance of cleanliness during the time of menstrual cycle in girls.
Detection of which hormone in urine is an indicator of pregnancy?
The life of corpus luteum is generally about ______ days in the absence of pregnancy
Menstruation begins due to ______.
Calculate the number of spermatozoa produced by a single primary spermatocyte.
In the absence of fertilization, corpus luteum ____________.
Secretion of progesterone by corpus luteum is initiated by ______.
Corpus luteum ______.
Which one of the following statements is incorrect about menstruation?
A human female reaches menopause aroung the age of ______.
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. |
The peak observed in Subject 1 and 2 is due to ______
The Corpus luteum grows during menstruation.
Which of the following events is not associated with ovulation in human females?
The main function of mammalian corpus luteum is to produce ______.
Which of the following events is not associated with ovulation in human females?
After ovulation the collapsed ovarian follicle shrinks and becomes filled with cell to form:
The level of progesterone is high at which phase in the menstrual cycle?
What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.
The figure show a section of human ovary. Select the option which gives the correct identification of either A or B with function/characteristic.
