English
Karnataka Board PUCPUC Science 2nd PUC Class 12

What is menstrual cycle? - Biology

Advertisements
Advertisements

Question

What is menstrual cycle?

Short Answer
Advertisements

Solution

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.

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Human Reproduction - NCERT EXERCISES [Page 117]

APPEARS IN

Nootan Biology [English] Class 12 ISC
Chapter 3 Human Reproduction
NCERT EXERCISES | Q 17. (i) | Page 117

RELATED QUESTIONS

the Biological/technical term for Complete stoppage of menstrual cycle in females


Give a significant point of difference between the oestrous and menstrual cycles.


Define Amenorrhea


Explain the menstruation phases in the menstrual cycle of a human female.


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.


Explain the importance of cleanliness during the time of menstrual cycle in girls.


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.

Do you think that Rahini’s objection towards her parents was correct? If so, Why?


The menstrual cycle ceases during pregnancy.


Find the wrongly matched pair.


The following is the illustration of the sequence of ovarian events (a-i) in a human female.

Name the ovarian hormone and the pituitary hormone that have caused the above-mentioned events.


Progesterone peaks during which phase of the menstrual cycle?


The life of corpus luteum is generally about ______ days in the absence of pregnancy


The temporary endocrine gland in humans is ______.


____________ is transformed to corpus luteum during luteal phase of the menstrual cycle.


On the fourteenth day of the menstrual cycle the female gamete released is _____.


Corpus luteum produces ______.


In the human female, menstruation can be deferred by the administration of ______.


Which one of the following events is correctly matched with the time period in a normal menstrual cycle?


A human female reaches menopause aroung the age of ______.


About which day in a normal human menstrual cycle does rapid secretion of LH (Popularly called LH Surge) normally occurs?


Describe hormonal control in various phases of the menstrual cycle.


Answer the following questions by observing the diagram of menstrual cycle: 

  1. What is the period of menstruation?
  2. On which day does ovulation occur during the menstrual cycle?
  3. In the menstrual cycle which reproductive organs undergo changes?
  4. Which period is said to be the period of regeneration of endometrium?
  5. Which period is said to be the period of secretions of glands in endometrium?

Which of the following statement is correct?


The graph given below shows the number of primordial follicles per ovary in women at different ages. Study the graph and answer the questions that follow.

  1. What is the average age of the women at the onset of menopause?
  2. At what age are maximum primordial follicles present in the ovary, according to the given graph?

The onset of menstruation in a human female is called ______.


The enlarged mature follicle bursts to release the egg.


The onset of menstruation in women is called ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×