Human Health and Diseases Chapter-Wise Test 22

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following diseases is caused by the human immunodeficiency virus (HIV)?

Hepatitis
AIDS
Influenza
Tuberculosis
2

AIDS is caused by the human immunodeficiency virus (HIV), which weakens the immune system over time.

Which of the following acts as a mechanical barrier in innate immunity?

Mucus
Interferons
Macrophages
T-lymphocytes
1

Mucus traps pathogens and prevents their entry, serving as a mechanical barrier in innate immunity.

Which cells are primarily responsible for antibody production in the immune response?

T-lymphocytes
B-lymphocytes
Macrophages
Neutrophils
2

B-lymphocytes produce antibodies in response to pathogens as part of the humoral immune response.

Which of the following is NOT a characteristic feature of inflammation?

Redness
Swelling
Pain
Decreased blood supply
4

Inflammation increases blood supply to the affected area, leading to redness, swelling, and pain.

Which mosquito is responsible for transmitting the filarial worm that causes elephantiasis?

Aedes
Culex
Anopheles
Mansonia
2

Elephantiasis (filariasis) is caused by Wuchereria bancrofti and is transmitted by Culex mosquitoes.

Which of the following components of the immune system provides long-term immunity?

Neutrophils
Memory B-cells
Basophils
Macrophages
2

Memory B-cells retain information about pathogens and provide long-term immunity upon re-exposure.

Which of the following statements about histamine is correct?

Histamine is released by mast cells.
Histamine suppresses inflammation.
Histamine is not involved in immune responses.
Histamine is produced by B-lymphocytes.
1

Histamine is released by mast cells during allergic reactions and contributes to inflammation.

Which of the following statements about lymph nodes is correct?

Lymph nodes produce red blood cells.
Lymph nodes filter pathogens from lymph.
Lymph nodes transport oxygen in the body.
Lymph nodes have no role in the immune system.
2

Lymph nodes filter pathogens and foreign particles from lymph, helping in immune defense.

Which of the following is an example of passive immunity?

Vaccination
Administration of antitoxin
Recovery from an infection
Production of antibodies after infection
2

Passive immunity occurs when ready-made antibodies, such as antitoxins, are introduced into the body.

Which of the following statements about phagocytosis is correct?

Phagocytosis is performed by macrophages and neutrophils.
Phagocytosis is carried out by red blood cells.
Phagocytosis does not involve pathogen destruction.
Phagocytosis occurs only in the lungs.
1

Macrophages and neutrophils are the primary phagocytic cells that engulf and digest pathogens.

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