हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Mention the importance of LH surge during menstrual cycle.

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प्रश्न

Mention the importance of LH surge during menstrual cycle.

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उत्तर

A rapid surge in LH induces the rupture of the Graafian follicle. This facilitates the release of an ovum. Thus, the rapid surge in LH facilitates ovulation.

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  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 3: Human Reproduction - VERY SHORT ANSWER [पृष्ठ २१]

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एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
अध्याय 3 Human Reproduction
VERY SHORT ANSWER | Q 14. | पृष्ठ २१

संबंधित प्रश्न

Describe the roles of pituitary and ovarian hormones during the menstrual cycle in a human female.


Explain menstrual cycle in human females.


How can the scientific understanding of the menstrual cycle of human females help as a contraceptive measure?


Draw a neat and well-labeled diagram showing T.S. of the ovary and describe the menstrual cycle in human females. 


Give Reasons

The chances of pregnancy to occur are most favourable on or about the 14th day of the menstrual cycle. Explain.


Name the Following

Sloughing of the uterine wall during menstrual flow.


Multiple choice question.

Rupturing of follicles and discharge of ova is known as _______.


Why menstrual cycle does not take place before puberty and during pregnancy?


Which set is similar?


Withdrawal of which of the following hormones is the immediate cause of menstruation?


Which of the following events is not associated with ovulation in human females?


Identify the correct statement from the following:


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.

  1. Which phases are indicated by ‘C’ and ‘D’?
  2. Name the structures labelled ‘F’. What is its role?
  3. Explain the changes in the level of progesterone during phases ‘C’ and ‘D’.
  4. Which hormone present in the urine confirms pregnancy in human beings?
  5. Identify the structure labelled ‘E’. Name the hormone released by it.

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


Name the following:

Two layers of the wall of uterus.


The onset of menstruation in women is called ______.


In the human menstrual cycle, the ovulation occurs around ______.


Given below is a group of terms. In the group, one pair indicates the relationship between the two terms. Rewrite and complete the second pair on a similar basis.

Follicular phase: 5-12 days:: Luteal phase : ______ days.


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