You are playing a new video game that is based on the human immune system. The player is inside a human, and you must successfully fend off invading pathogens in a quest to find the "Golden Antibody." At level 1, your arsenal for fighting off pathogens consists only of the innate immunity leukocytes and their various secretions. If the enemy has killed off most of your neutrophils and macrophages, which of the following should you utilize to recruit more of these leukocytes to the battle?
A) bone marrow
B) reactive oxygen species
C) platelets
D) cytokines
E) histamine

Question

Quizplus · Accepted Answer

Cytokines are signaling molecules that help recruit and activate leukocytes, including neutrophils and macrophages, to the site of infection. Therefore, utilizing cytokines would be the best choice to recruit more of these leukocytes to the battle. Bone marrow produces leukocytes but may not be immediately accessible in the game. Reactive oxygen species, platelets, and histamine are involved in immunity but not specifically in recruiting neutrophils and macrophages.

You Are Playing a New Video Game That Is Based