Question

4
select the correct answer
larry is taking a walk in the park. the pollen in the air makes him sneeze constantly. what line of defense is his immune system exhibiting?
a. first line of defense
b. second line of defense
c. third line of defense
d. fourth line of defense

Explanation:

The immune system's first line of defense includes physical and chemical barriers, but the second line (innate immunity) involves non - specific responses like inflammation (as seen with Larry's sneezing due to pollen, an immune response). The first line is more about barriers (skin, mucus), third and fourth are adaptive (specific, slower). So Larry's immune response here is the second line.

Answer:

B. second line of defense