题目
题目
单项选择题

B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. Which of the following is not one of the reasons B-lymphocytes are considered part of the adaptive immunity?

选项
A.A) They produce memory cells when activated.
B.B) They are a first line of defense that can begin killing pathogens immediately.
C.C) Their receptors will bind to only one antigen.
D.D) They require costimulation from an activated T-helper cell.
E.E) Their action involves production of antibodies
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思路分析
Examining the statement about B-lymphocytes and their classification in the immune system requires separating innate and adaptive features. Option A: 'They produce memory cells when activated.' This is a hallmark of adaptive immunity, since memory B cells enable quicker and stronger responses upon re-e......Login to view full explanation

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