Select the immunoglobin (Ig) classes that is correctly matched to their facts. Check all that apply.
_____ IgA—found in saliva, tears, the GI tract, and mother's milk
_____ IgD—serve as receptors on the surfaces of T cells
_____ IgE—promotes the release of histamine from mast cells and basophils, causing allergy symptoms
_____ IgG—a minor form of immunoglobulin, used only in response to parasitic worms
_____ IgM—first secreted during primary response, promotes agglutination, activates complement
__X__ IgA—found in saliva, tears, the GI tract, and mother's milk
_____ IgD—serve as receptors on the surfaces of T cells
__X__ IgE—promotes the release of histamine from mast cells and basophils, causing allergy symptoms
_____ IgG—a minor form of immunoglobulin, used only in response to parasitic worms
__X__ IgM—first secreted during primary response, promotes agglutination, activates complement
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Which of the following is a primary structural constituent of the plant cell secondary wall?
A) hemicellulose B) extensin C) collagen D) pectin E) cellulose
In your own words, explain why some bacterial species produce endospores. What are their purpose?
What will be an ideal response?
Which of the following groups of drugs can become incorporated into the bones and teeth of a fetus?
A) beta-lactams B) aminoglycosides C) quinolones D) tetracyclines E) sulfonamides