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  4. Human Health and Diseases Chapter-Wise Test 3

Human Health and Diseases Chapter-Wise Test 3

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which class of drugs is derived from Cannabis sativa?

Opioids
Cannabinoids
Cocaine
Barbiturates
2

Cannabinoids are derived from the Cannabis sativa plant and affect the central nervous system.

Which of the following statements about cancer cells is TRUE?

They exhibit controlled cell division
They lack the property of contact inhibition
They cannot metastasize
They have a normal lifespan
2

Cancer cells lose the property of contact inhibition, allowing them to grow uncontrollably and invade surrounding tissues.

Which of the following is an example of passive immunity?

Vaccination
Recovery from an infection
Receiving antibodies from mother’s milk
Production of memory cells
3

Passive immunity occurs when ready-made antibodies are received, such as those in mother’s milk (IgA).

Which cells are primarily responsible for cell-mediated immunity?

B-lymphocytes
T-cytotoxic cells
Macrophages
Basophils
2

T-cytotoxic cells (CD8+ T-cells) play a central role in cell-mediated immunity by destroying virus-infected and cancerous cells.

Which type of T-lymphocytes help in activating B-lymphocytes?

Cytotoxic T-cells
Memory T-cells
Helper T-cells
Suppressor T-cells
3

Helper T-cells (CD4+ cells) assist in activating B-lymphocytes to produce antibodies.

Which of the following is NOT a symptom of pneumonia?

Fever
Cough
Grayish-blue lips
Skin rashes
4

Skin rashes are not a symptom of pneumonia; the disease primarily affects the respiratory system, causing fever, cough, and breathing difficulties.

Which type of cells are responsible for long-term immunity?

Plasma cells
Neutrophils
Memory cells
Macrophages
3

Memory B-cells and T-cells retain information about pathogens and provide long-term immunity.

Which viral disease is primarily transmitted through sexual contact, contaminated needles, and blood transfusions?

Hepatitis A
HIV/AIDS
Influenza
Chickenpox
2

HIV/AIDS is primarily transmitted through sexual contact, contaminated needles, and infected blood transfusions.

Which component of the immune system is responsible for memory response?

Macrophages
Memory B-cells
Neutrophils
Basophils
2

Memory B-cells are responsible for immunological memory, allowing a faster and stronger response upon second exposure to the same antigen.

Which of the following statements about interferons is incorrect?

Interferons help protect cells from viral infections.
Interferons are produced by virus-infected cells.
Interferons act as antibodies.
Interferons enhance immune responses.
3

Interferons are not antibodies; they are signaling proteins that help prevent viral replication.

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