Innate Immunity Barriers

Q. To which type of barries under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?

1. Physiological barriers
2. Physical barriers
3. Cytokine barriers
4. Cellular barriers

Q. Which one of the following acts as a physiological barrier to the entry of microorganisms in human body ?

1. Skin
2. Epithelium of urogenital tract
3. Tears
4. Monocytes

Q.

Innate immunity involves all except