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Hef Hef
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5 years ago
When an antigen-presenting cell interacts successfully with a helper T cell, the antigen-presenting cell secretes a signal molecule that assists in the activation of the helper T cell. This signal molecule is
A) interferon.
B) complement.
C) interleukin-1.
D) perforin.
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Campbell Biology: Concepts and Connections

Campbell Biology: Concepts and Connections


Edition: 8th
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MarvinbogMarvinbog
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