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प्रश्न
What is menstrual cycle?
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उत्तर
The menstrual cycle is the cyclic change of the reproductive tract of a primate female. This period is marked by a characteristic event repeated almost every month (28 days with minor variation) in the form of a menstrual flow (i.e., shedding of the endometrium of the uterus with bleeding). Only during pregnancy does it temporarily cease.
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संबंधित प्रश्न
Identify True/False statement. Correct false statement to make it true.
Menstrual cycle ceases during pregnancy.
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.
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.
Briefly describe the secretory phase of the menstrual cycle.
Define: Menarche
Read the following passage and answer the question that follows:
Rahini and her parents were watching a television program. An advertisement flashed on the screen which was promoting the use of sanitary napkins. Rahini’s parents suddenly changed the channel, but she objected to her parents and explained the need and importance of such an advertisement.
List out the napkin hygiene measures taken during menstruation?
Painful menstruation is termed as ____________.
Detection of which hormone in urine is an indicator of pregnancy?
Identify the phase of the menstrual cycle during which there is a peak in the level of progesterone.
The life of corpus luteum is generally about ______ days in the absence of pregnancy
If the corpus luteum is present in the ovary even after 72 hours after ovulationit indicates that ______.
The temporary endocrine gland in humans is ______.
When does ovulatory phase occur?
On the fourteenth day of the menstrual cycle the female gamete released is _____.
The correct sequence of hormone secretion from the beginning of menstruation is ______.
The mammalian corpus luteum produces ______.
In the human female, menstruation can be deferred by the administration of ______.
Mature Graafian follicle is generally present in the ovary of a healthy human female around stet ______.
Hormones responsible for menstrual cycle are produced from ______.
The main function of mammalian corpus luteum is to produce ______.
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.
Answer the following questions by observing the diagram of menstrual cycle:
- What is the period of menstruation?
- On which day does ovulation occur during the menstrual cycle?
- In the menstrual cycle which reproductive organs undergo changes?
- Which period is said to be the period of regeneration of endometrium?
- Which period is said to be the period of secretions of glands in endometrium?
Write a short note on Secretory Phase.
Name the following:
The permanent stoppage of menstruation in human females around the age of 45 years.
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.
Give a reason for the following:
The second half of the menstrual cycle is called the luteal phase as well as the secretory phase.
In the human menstrual cycle, the ovulation occurs around ______.
