Which of these is true of the secondary immune response?
a) it produces memory lymphocytes.
b) it can make antibodies immediately.
c) it responds with naïve b- and t- cells.
d) its lag phase may be longer than 7 days.

The correct answer is option B) It can make antibodies immediately.

Explanation:

The secondary immune response occurs when the same antigen is exposed to the person more than one time. The immune system immediately starts making antibodies to attack the antigen. By the second time, memory cells are established and start making antibodies immediately. The lag phase is shorter as compared to the primary immune response. Memory cells are cells responding cells for secondary immune response.

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