One Major Difference Between the Innate and Adaptive Immune Responses

Essay

One major difference between the innate and adaptive immune responses is in the mechanism by which pathogens are recognized. Innate immune cells use pattern recognition receptors (PRRs) to recognize conserved determinants shared by all the members of a category of pathogens, whereas adaptive immune cells (B and T lymphocytes) have highly specific antigen receptors.

a) Which of the patterns of receptor expression in Figure represent innate immune cells?

b) Which of the patterns of receptor expression represent B and T lymphocytes?
c) Following an infection, how does the population of innate cells change? Starting with the cartoon representing your answer to part (a), draw the population present at one week post-infection.
d) Following infection, how does the population of B and T lymphocytes change? Starting with the cartoon representing your answer to part (b), draw the population present at one week post-infection.