Home
Class 12
BIOLOGY
Assertion : The menstrual flow results d...

Assertion : The menstrual flow results due to breakdown of endometrial lining of the uterus and its blood vessels .
Reason : Rapid fall in the level of progesteron takes place due to degeneration of corpus luteum .

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion .

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False .

D

If both Assertion & Reason are False.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH

    ALLEN|Exercise Exercise -I (Conceptual Questions)|25 Videos

  • REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH

    ALLEN|Exercise Exercise-II (AIPMT 2008)|2 Videos

  • REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH

    ALLEN|Exercise Exercise-III(A) (Ncert Based Questions)|112 Videos

  • REPRODUCTIVE HEALTH

    ALLEN|Exercise S|19 Videos

  • RESPIRATION IN PLANTS

    ALLEN|Exercise Diagram Based question|5 Videos

Similar Questions

Explore conceptually related problems

Assertion : If fertilization does not occur than the corpus luteum begins to degenerate . Reason : The levels of progesterone and estrogen decline due to degeneration of the corpus luteum .

Read the following statements regarding menstrual cycle in females : A. It is the reproductive cycle in all mammalian females. B. The menstrual flow results due to breakdown of myometrium lining of uterus. C. Graafian follicle and endometrium of uterus regenerates simultaneously during follicular phase of menstrual cycle. D. The corpus luteum secretes large amounts of oestrogen which is essential for maintenance of endometrium. select the correct statement from the above ?

Assertion : Warming a room by a heat blower is an example of forced convection. Reason : Natural convection takes place due to gravity.

Assertion : Ovulation occurs on the 14^(th) day of menstrual cycle in a human female . Reason : The high level of estrogen is controlled 2 or 3 days before this event due to negative feed back.

some important events that occur during the menstrual cycle are given below. Arrange the events in a proper sequence and select the corrrect option. (i). Proliferation of endometrial wall (ii). LH surge (iii). Secretion of estrogen (iv). Secretion of progesterone (v). Ovulation (vi). Growth of corpus luteum (vii). Degeneration of corpus luteum (viii). menstruation

Assertion : Angina pectoris means ''pain in the chest''. Reason : It results due to carrying of extra blood to the heart muscle.

Assertion : Corpus luteum is present in proliferative phase of menstrual cycle . Reason : High concentration of progesterone is present in proliferative phase .

Read the following statements about menstrual cycle and select two correct statements. (i) Lack of menstruation may be indicative of pregnancy. (ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only. (iii) LH surge induces ovulation. (iv) If fertilization occurs, corpus luteum degenerates immediately

Assertion :- Progressive degeneration of skeletal muscle mostly due to genetic disorder, is muscular dystrophy. Reason :- Rapid spasms in muscle due to low Ca^(2+) in body fluid, is tetany. (a) If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion . (b) If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion (c) If Assertion is True but the Reason is False. (d) If both Assertion & Reason are false.

Assertion: The electric field due to dipole on its axis line at a distance r is E . Then electric field due to the same dipole on the equatorial line and at the same distance will be (E )/(2) Reason: Electric field due to dipole varies inversely as the square of distance.

ALLEN-REPRODUCTIVE SYSTEM , EMBRYOLOGY AND REPRODUCTIVE HEALTH -Exercise-IV (Assertion & Reason)
  1. Assertion : Vasectomy is considered in permanent sterilization method...

    Text Solution

    |

  2. Assertion : Zona pellucida is glycoproteinous in nature and dissolved ...

    Text Solution

    |

  3. Assertion : The menstrual flow results due to breakdown of endometrial...

    Text Solution

    |

  4. Assertion : During follicular phase , the primary follicles in the ova...

    Text Solution

    |

  5. Assertion : The level of FSH & LH attain a peak level in the middle of...

    Text Solution

    |

  6. Assertion : Regular cyclic menstruation is an indicator of normal repr...

    Text Solution

    |

  7. Assertion : The acrosomal secretions of sperm , help it in entering in...

    Text Solution

    |

  8. Assertion : The nucleus of sperm fuses with the nucleus of ovum , befo...

    Text Solution

    |

  9. Assertion : Females not participate in the determination of the sex of...

    Text Solution

    |

  10. Assertion : hCG , hPL and relaxin are produced in women only during pr...

    Text Solution

    |

  11. Assertion : If fertilization does not occur than the corpus luteum be...

    Text Solution

    |

  12. Assertion : The mammary glands of the female starts producing milk jus...

    Text Solution

    |

  13. Assertion : All Eutherian are placental mammals . Reason : All place...

    Text Solution

    |

  14. Assertion : Primary spermatocytes of testes are haploid . Reason : P...

    Text Solution

    |

  15. Assertion : Estrogen level is high during the follicular phase of mens...

    Text Solution

    |

  16. Assertion : Normally monospermy occurs in most of animals . Reason :...

    Text Solution

    |

  17. Assertion : Nucleocytoplasmic ratio decreases in cleavage . Reason :...

    Text Solution

    |

  18. Assertion : Egg of eutherian is multicellular . Reason : Many follic...

    Text Solution

    |

  19. Assertion : Presence of zona pallucida over the fertilized ovum preven...

    Text Solution

    |

  20. Assertion : Cleavage in human zygote is holoblastic . Reason : Its e...

    Text Solution

    |