_____infections are caused by a microbe that invades because of the weakened defenses due to an infection by a different agent. (I10)

Which of the following is the most likely reason that behaviorists moved away from a cognitive approach for understanding the human experience?

Why is the secondary response to antigen so much more vigorous than the primary response? (D15)

Give an example of naturally acquired passive immunity. (D16)

What are the body’s three lines of defense?  +3 (D4)

A group of proteins that circulating in the blood stream that interact to lyse cells, opsonize and/or attract phagocytes. (D8)

How does a communicable infection differ from a non-communicable infection? (I11) 

Botulism is do to ingesting a toxin in food that causes paralysis.  The bacteria that produces the toxin lives in the environment (soil).   Botulism would be classified as ______. (I11)

How is a microbial opportunist different from a pathogen?   (D1)

Give an example of a zoonosis. (I13)