Human Health and Diseases Chapter-Wise Test 23

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following statements about interferons is incorrect?

Interferons help protect cells from viral infections.
Interferons are produced by virus-infected cells.
Interferons directly kill bacteria.
Interferons enhance immune responses.
3

Interferons do not directly kill bacteria; they help protect cells from viral infections.

Which of the following statements about antigen-antibody interactions is correct?

Antibodies bind to specific antigens.
Antigens are produced by the immune system.
Antigen-antibody interactions do not contribute to immune responses.
Antibodies destroy pathogens by themselves.
1

Antibodies recognize and bind to specific antigens, helping in immune defense by neutralizing or marking pathogens for destruction.

Which of the following statements about histamine is incorrect?

Histamine is involved in allergic reactions.
Histamine is released by mast cells.
Histamine inhibits inflammation.
Histamine causes vasodilation.
3

Histamine does not inhibit inflammation; instead, it promotes inflammation and allergic responses.

Which of the following cells release histamine during an allergic reaction?

Neutrophils
Mast cells
Macrophages
Erythrocytes
2

Mast cells release histamine, leading to symptoms of allergic reactions such as inflammation and itching.

Which of the following statements about phagocytes is correct?

Phagocytes engulf and digest pathogens.
Phagocytes only function in allergic reactions.
Phagocytes transport oxygen to tissues.
Phagocytes are not part of the immune system.
1

Phagocytes, such as macrophages and neutrophils, play a key role in engulfing and digesting pathogens.

Which of the following is a common symptom of tuberculosis?

Skin rashes
Persistent cough with blood
Severe diarrhea
Paralysis
2

Tuberculosis (TB) primarily affects the lungs and causes symptoms like persistent cough, chest pain, and coughing up blood.

Which of the following substances is used as a narcotic analgesic in pain relief?

Morphine
Aspirin
Paracetamol
Ibuprofen
1

Morphine is a narcotic analgesic that is used to relieve severe pain, especially in post-surgical patients.

Which immune response is primarily responsible for protection against intracellular pathogens like viruses?

Humoral immunity
Cell-mediated immunity
Innate immunity
Passive immunity
2

Cell-mediated immunity, mediated by T-cells, is responsible for eliminating intracellular pathogens like viruses.

Which vaccine is used to prevent tuberculosis?

Hepatitis B vaccine
BCG vaccine
DPT vaccine
Polio vaccine
2

The Bacillus Calmette-Guérin (BCG) vaccine is used for immunization against tuberculosis.

Which of the following statements about the lymphatic system is incorrect?

The lymphatic system helps in immune responses.
Lymph nodes filter and trap pathogens.
The lymphatic system is responsible for oxygen transport.
Lymphatic vessels help in the absorption of dietary fats.
3

The lymphatic system is not responsible for oxygen transport; its primary functions include immune defense and fluid balance.

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