Biology

Bacteria entering the body through a small cut in the skin A) inactivate the ery

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In some insects, such as Drosophila, fungal cell wall elements can activate the

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Mammals have Toll-like receptors (TLRs) that can recognize a kind of macromolecu

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Histamines trigger dilation of nearby blood vessels as well as an increase in th

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Septic shock, a systemic response including high fever and low blood pressure, i

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Infection by a bacterium that has elements on its surface that enhance its resis

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Adaptive immunity depends on A) traits common to groups of pathogens. B) pathoge

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Bacterial infection in a previously uninfected house cat would most quickly acti

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A key part of the humoral immune response is A) the attack of cytotoxic T cells

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The receptors on T cells and B cells bind to A) antibodies. B) antigens. C) natu

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An epitope is A) part of the interferons that penetrate foreign cells. B) a prot

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B cells have antigen receptors that bind to antigens that are either freely diss

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Within a differentiated B cell, the rearrangement of DNA sequences between varia

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Clonal selection of B cells activated by antigen exposure leads to production of

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Antigens are A) proteins found in the blood that cause foreign blood cells to cl

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A newborn who is accidentally given a drug that destroys the thymus would most l

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Clonal selection implies that A) brothers and sisters have similar immune respon

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Clonal selection is an explanation for how A) a single type of stem cell can pro

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Secondary immune responses upon a second exposure to a pathogen are due to the a

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The MHC is important in a T cell's ability to A) distinguish self from nonself.

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A patient who can produce antibodies against some bacterial pathogens, but not a

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The activation of helper T cells is likely A) when an antigen is displayed by a

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An immunoglobulin (Ig) molecule, of whatever class, with regions symbolized as C

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The ability of one person to produce over a million different antibody molecules

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Immunological memory accounts for A) the human body's ability to distinguish sel

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