Human Health and Disease Moderate Questions and Answers | Page - 16

Human Health and Disease

Hypersensitivity to an allergen is associated with

1. aberrant functioning of the immune mechanism
1. increase in ambient temperature
1. age of the individual
1. food habits

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Allergy means all kinds of untoward reactions manifested in the body due to hypersensitivity of substances called allergens. Allergy reactions occur due to liberation of histamine by tissue cells.

Correct Option: A

Allergy means all kinds of untoward reactions manifested in the body due to hypersensitivity of substances called allergens. Allergy reactions occur due to liberation of histamine by tissue cells.

Which of the following diseases is due to an allergic reaction?

1. Goitre
1. Skin cancer
1. Hay fever
1. Enteric fever

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Hay fever is due to some fungal spores sensitivity, which is an allergic disease with symptoms of bronchial asthma and skin rash and also with increase in eosinophil (white cells) of blood.

Correct Option: C

Hay fever is due to some fungal spores sensitivity, which is an allergic disease with symptoms of bronchial asthma and skin rash and also with increase in eosinophil (white cells) of blood.

Cells involved in immune mechanism are

1. Erythrocytes
1. Lymphocytes
1. Eosinophils
1. Thrombocytes

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Lymphocytes are the part of specific defence system called immune system.

Correct Option: B

Lymphocytes are the part of specific defence system called immune system.

Match the following sexually transmitted diseases (Column-I) with their causative agent (Column-II) and select the correct option:
Column I Column II
(A) Gonorrhea (i) HIV
(B) Syphilis (ii) Neisseria
(C) Genital Warts (iii) Treponema
(D) AIDS (iv) Human papilloma-Virus

1. (A) (B) (C) (D)
  (iii) (iv) (i) (ii)
1. (A) (B) (C) (D)
  (iv) (ii) (iii) (i)
1. (A) (B) (C) (D)
  (iv) (iii) (ii) (i)
1. (A) (B) (C) (D)
  (ii) (iii) (iv) (i)

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Gonorrhoea – Neisseria (Bacteria)
Syphilis – Treponema (Bacteria)
Genital Warts – Human papilloma virus
AIDS – HIV (Virus)

Correct Option: D

Gonorrhoea – Neisseria (Bacteria)
Syphilis – Treponema (Bacteria)
Genital Warts – Human papilloma virus
AIDS – HIV (Virus)

HIV that causes AIDS, first starts destroying:

1. Leucocytes
1. Helper T- Lymphocytes
1. Thrombocytes
1. B- Lymphocytes

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After infection, HIV starts to destroy the T-cells (T-helper lymphocytes). T. cells are very important for the immune system. In the early stage of infection, the decline in numbers of T.cells is observed.

Correct Option: B

After infection, HIV starts to destroy the T-cells (T-helper lymphocytes). T. cells are very important for the immune system. In the early stage of infection, the decline in numbers of T.cells is observed.