Antigens

safaTerkawi

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2022-08-06

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Antigens

Are usually proteins or polypeptide molecules
Can only be recognized by immune system cells previously exposed to that antigen
Are normally absorbed from the gut via lymphatics and carried to mesenteric lymph nodes.
Induce a smaller immune response when protein synthesis is suppressed.
Are taken up by antigen-presenting macrophages which activate the immune system.

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safaTerkawi

2022-08-07

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A. True Large carbohydrate molecules may also be antigenic.

B. False The ability to recognize foreign antigens is innate and does not depend on previous exposure to them.

C. False Antigens, being proteins or carbohydrates, are not normally absorbed; they are digested in the gut.

D. True Antibodies are proteins synthesized by ribosomes in activated lymphocytes.

E. True Antigens can also act directly on receptors on lymphocyte membranes

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