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Immune system MCQ

An antigen _____.

Is a protein molecule that helps defend the body against disease

Is a foreign molecule that evokes a specific response by a lymphocyte

Induces development of white blood cells in the bone marrow

Is a protein attacked by an invading microorganism

Could be an invading bacterium

Answer

Correct Answer: Is a foreign molecule that evokes a specific response by a lymphocyte

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Activated cd8 t cells become __________.

Cytotoxic T cells.

Helper T cells

Plasma cells

B cells

Memory cells

Answer

Correct Answer: Cytotoxic T cells.

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_____ interact with the antigen-class ii mhc complex presented by macrophages.

Helper T cells

Plasma cells

B cells

Memory cells

Answer

Correct Answer: Helper T cells

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Interferons ________

Interfere with viral replication within cells

Are routinely used in nasal sprays for the common cold

Act by increasing the rate of cell division

Are virus-specific, so that an interferon produced against one virus could not protect cells

Against another virus

Answer

Correct Answer: Interfere with viral replication within cells

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B cells interacting with helper t cells are stimulated to differentiate when _____.

B cells produce IgE antibodies

B cells release cytokines

Cytotoxic T cells present the class II MHC molecule-antigen complex on their surface

Helper T cells release cytokines

Answer

Correct Answer: Helper T cells release cytokines

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The phagocytic antigen-presenting cells belong to the ________ group.

Monocyte-macrophage

In an isotonic solution

Hypertonic solution

Losing water

In a hypotonic solution

Answer

Correct Answer: Monocyte-macrophage

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Click on the cell to start the animation. this plant cell is _____.

In an isotonic solution

Hypertonic solution

Losing water

In a hypotonic solution

Lysing

Answer

Correct Answer: In a hypotonic solution

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The cells responsible for humoral immunity are the ________ cells.

Helper T

Cytotoxic T

Suppressor T

Answer

Correct Answer: B

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The body's ability to resist pathogens and disease is called ____.

Immunity

Disease

White blood cells

Influenza

Answer

Correct Answer: Immunity

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The _____ system of blood proteins acts to lyse foreign cells and viruses.

Complement

Disease

White blood cells

Influenza

Answer

Correct Answer: Complement

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_____ are leukocytes that provide immunological defenses against many infectious organisms.

Monocytes

Dendritic cells.

Phagocytes

Cytokines

Answer

Correct Answer: Monocytes

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Stress suppresses the immune response through the action of __________.

Glucocorticoids

Antibodies

Lympedema

Answer

Correct Answer: Glucocorticoids

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When the body is attacked by a foreign substance, the _____ defenses are the first to react.

Macrophages

Dendritic Cells

White Blood Cells

Lymphocytes

Answer

Correct Answer: Macrophages

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_____ are the cells of the innate immune system that digest cellular debris and pathogens.

Macrophages

Monocyte

Neutrophils

Mast cells

Answer

Correct Answer: Macrophages

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White blood cells and ____ carry out innate immune responses

Defensive proteins

Red blood cells

Platelets

Plasma

Answer

Correct Answer: Defensive proteins

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