Question

To which type of barriers under innate immunity do the saliva in the mouth and the tears from the eyes belong?

• A. physiological barriers
• B. cellular barriers
• C. cytokine barriers
• D. physical barriers

Answer 1

The correct option is A

physiological barriers

The correct option is A.

Explanation of the correct option:

1. Physiological barriers belong to the group of the innate immunity system.
2. These barriers include secretions from various organs that don't allow the growth of microorganisms that are capable of passing the physical barriers.
3. Physiological barriers include white blood cells like leukocytes, monocytes, natural killer cells, and macrophages that perform phagocytosis.

Explanation of the incorrect option:

Option B:

Cellular barriers include white blood cells like leukocytes, monocytes, monocytes, natural killer cells, and macrophages that perform phagocytosis.

Option C:

1. Cytokine barriers include interferons that are secreted by the cells which have been infected by viruses.
2. These barriers prevent the non-infected cells from infection.

Option D:

Physical barriers consist of mucus, skin, membranes of the digestive tract, respiratory tract, and urogenital tract.

Final answer: The saliva in the mouth and the tears from the eyes belong to the physiological barriers under innate immunity.