Home
Class 12
BIOLOGY
Due to increasing air-borne allergens an...

Due to increasing air-borne allergens and pollutants, many people in urban areas are suffering from respiratory disorder cause wheezing due to:

A

benign growth on mucous lining of nasal cavity

B

inflammation of bronchi and bronchioles

C

proliferation of fibrous tissues and damage of the alveolar walls

D

reduction in the secretion of surfactants by pneumocytes.

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Pollen grains of many species cause severe allergies & bronchial afflictions in some people often leading to chronic respiratory disorder such as :-

Industrial melanism in peppered moth occurred due to natural selection . The significant reason for this is (a) the light coloured white moths could not be noticed by predatory birds after deposition of soots on bark of trees (b) mutation in light coloured moths due to increase in industrial pollution (c) advantageous selection of black moths on tree in polluted areas, resulting in increase population of black moths (d) advantageous selection of white moths on tree in polluted areas, resulting in increased population of white moths

[A] : Thiamine deficiency results in beriberi causing paralysis. [R]: People eating raw fish may also suffer from paralysis due to the deficiency of vitamin B1. Cooked fish has no such effect. a) If both A and R are true and R is the correct explanation of A b) If both A and R are true but R is not the correct explanation of A c) If A is true and R is false d) If both A and R are false

Children in metro cities of India suffer from allergies and asthma because they are more sensitive to allergens and have low immunity due to

In the metropolitan cities of India, many children are suffering from allergy or asthma. What are the main causes of this problem? I. Due to sensitivity to the environment. II. Because of the protected environment provided early in life. III. Modern-day life style.

On an educational trip to Uttaranchal, Ketki and her friends observe that many local people were having swollen necks, Please help Ketki and her friends to find out the solutions to the following questions. ( a) which probable disease are these people suffering from? (b) How is it caused? (c) What effect does this condition have on pregnancy?

Which of the following is a chronic respiratory disorder in which alveolar walls are damaged due to which respiratory surgace is decreased? One of the major causes of this disease is cigarette smoking

Assertion : Dust particles when come in contact with respiratory tract lead to sneezing, running nose, redness of eyes etc. Reason : Allergic disorders are caused due to release of histamine.

Match column-I and II {:("Column-I","Column-II"),("(A)Asthma", "(i)Alveolar wall damaged"),("(B)Emphysema","(ii)Inflammation leading to fibrosis"),("(C )Occupational respiratory Disorders ","(iii)Wheezing due to inflammation of bronchi and bronchioles "):}

We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?

ALLEN-TEST PAPER 4-BIOLOGY
  1. Which of the following immune responses is responsible for rejection o...

    Text Solution

    |

  2. Which of the following muscular disorders is inherited

    Text Solution

    |

  3. Due to increasing air-borne allergens and pollutants, many people in u...

    Text Solution

    |

  4. Humans have acquired immune system that produces antibodies to neutral...

    Text Solution

    |

  5. Syndrome in which somatic cells contins three sex chromosomes XXY is

    Text Solution

    |

  6. Tumor cells have been shown to avoid detection and destruction by immu...

    Text Solution

    |

  7. Immature lymphocytes differentiates into antigensensitive lymphocytes ...

    Text Solution

    |

  8. Recognize the figure and find out the correct match

    Text Solution

    |

  9. The antigen binding site of an antibody is present at

    Text Solution

    |

  10. Recognise the figure and find out the correct matching :

    Text Solution

    |

  11. When a host is exposed to antigens, which may be in the form of living...

    Text Solution

    |

  12. The overall ability of the host to fight the disease causing ganisms, ...

    Text Solution

    |

  13. Transplantation of tissues/organs to save certain patients often fails...

    Text Solution

    |

  14. Blood transfusion is ……….. grafting.

    Text Solution

    |

  15. Fill in the blanks: 1. The .......a....... lymphoid organs provide ...

    Text Solution

    |

  16. Natural killer cells are type of-

    Text Solution

    |

  17. MALT constitutes about percent of the lymphoid tissue in human body.

    Text Solution

    |

  18. Sometime due to genetic and other unknown reasons, the body attacks se...

    Text Solution

    |

  19. The immune system plays an important role in (a) Recognition of f...

    Text Solution

    |

  20. Read the statements and choose the correct option. (I) Secretion of ...

    Text Solution

    |