Q Question 1 0.5 / 0.5 pts Components of the first line of defense include all the following except ________. Question 2 0.5 / 0.5 pts Nonspecific chemical defenses include ________. IncorrectQuestion 3 0 / 0.5 pts The human microbiome is considered an important component of the first line of defense. Which statement adequately reflects its role as a defensive barrier? Question 4 0.5 / 0.5 pts Immune system cells differentiate between self and foreign cells by their ________. Question 5 0.5 / 0.5 pts Which of the following is incorrect about circulating blood cells?
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