Question

How does saliva contribute to innate immunity?

Options

• It activates the complement system directly

• It produces phagocytic cells to destroy pathogens

• It secretes antibodies against bacteria

• It has an inhibitory effect on microorganisms

Answer 1

Saliva has an inhibitory effect on microorganisms, serving as a physiological barrier in the oral cavity and upper gastrointestinal tract. This antimicrobial action helps prevent microbial colonization and infection of the mouth and throat.