Which statement about the immune system is correct?
A) Memory cells are involved in a primary immune response.
B) Dendritic cells were first identified in the nervous system.
C) Interferons are specific proteins that block cell replication at the level of mitosis.
D) Natural killer cells are involved in both specific and nonspecific immune responses.
E) Defensins are one type of protective protein synthesized by T helper cells.

Question

Quizplus · Accepted Answer

Natural killer (NK) cells play a role in both the innate (nonspecific) and adaptive (specific) immune responses. They can target and destroy cells that do not present normal self-antigens, such as cells infected by viruses or transformed cancer cells, without prior sensitization to these targets.

Which Statement About the Immune System Is Correct