QUESTION IMAGE
Question
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
Las líneas de defensa del sistema inmunitario: la primera es barreras físicas y químicas (como la tos o estornudo para expulsar partículas extrañas como el polen antes de que entren profundamente en el organismo). El estornudo de Larry expulsa el polen, por lo que corresponde a la primera línea.
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A. first line of defense