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de SUNY College at Cortland * C Search .com/ibiscms/mod/ibis/view.php?id-4740206 Latest Headlines Jump to.. Gradeb 3/9/2018 05:00 PM 4 75/100 Cakulator -j Penodic Table Question 8 of 10 Sapling Learning Select examples of chemical barriers to infection in the human body. The low pH in the stomach kills pathogens entering the digestive system. Neutrophils phagocytize pathogens in the body. Antibodies recognize pathogens and attack infected cells. The acidic surface of the skin prevents bacterial growth. cilia in the respiratory system move pathogens trapped n mucus to the mouth. Hairs located in the ears and nose block pathogens. Enzymes in tears break down pathogens that touch the eyes. O Previous Check Answer Next Exit

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The correct options are:

The low pH in the stomach kills pathogens entering the digestive system.
The acidic surface of the skin prevents bacterial growth.
Cilia in the respiratory system move pathogens trapped in mucus to mouth.
Enzymes in tears break down pathogens that touch the eyes.

Chemical barriers, which prevent all types of foreign agents from penetrating the external layer of the body. Lysozyme enzyme, which is produced in tears. It acts as an antibiotic and kills bacteria. Gastric juice in the stomach, which destroys bacteria and most toxins because the gastric juice is highly acidic with low(pH 2-3). Acidity on skin inhibit bacterial growth. Mucus enzymes break down pathogens, that enter in the respiratory system.

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