Interaction & Interdependence C.7 Defence Against Disease (id: 229be2d76)

本题目来源于试卷: Interaction & Interdependence C.7 Defence Against Disease，类别为 IB生物学

[单选题]
This diagram shows the interactiou-a/q( uri5mv n bx+ hh zzx 2tsntigo f(9s4o,5*etween a helper T-cell and a B-lymphocyte.

A. Histamine
B. Antibody
C. Antigen
D. Killer T-cell


参考答案:  C


本题详细解析:

Explanation​:

Choice C is correct because antigens activate Helper T-cells when they bind to them and these then activate B lymphocytes. Choice A is incorrect because histamine is produced by mast cells. Choice B is incorrect because antibodies are proteins produced by B-lymphocytes. Choice D is incorrect because killer T-cells are white blood cells that destroy infected body cells.

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