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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.
APPEARS IN
संबंधित प्रश्न
Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female.
Mention one significant difference between Hormones of ovulatory phase and hormones of luteal phase
Define Amenorrhea
Give appropriate biological or technical terms for the following:
The onset of menstruation in a young girl
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.
Name the Following
The term used when females stop menstruation at the age of 45-50 years.
Describe the structure of a Graafian follicle.
What is the menstrual cycle?
Why menstrual cycle does not take place before puberty and during pregnancy?
Answer the following type of question Assertion (A) and Reason (R).
(A) - Ovulation is the release of the ovum from the Graafian follicle.
(R) - It occurs during the follicular phase of the menstrual cycle.
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
How long does the secretory phase of the menstrual cycle last?
In the absence of fertilization, corpus luteum ____________.
Choose the correct order of phases of the menstrual cycle.
The temporary endocrine gland in humans is ______.
Corpus luteum produces ______.
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Level of which hormones are at their highest during the luteal phase (second half of the cycle) of the menstrual cycle?
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. |
Which structure in the ovary will remain functional in subject 2?
Menstrual flow occurs due to lack of ______.
The main function of mammalian corpus luteum is to produce ______.
Which of the following events is not associated with ovulation in human females?
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.
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.
Name the following:
Two layers of the wall of uterus.
In the human menstrual cycle, the ovulation occurs around ______.
