Question

Select examples of chemical barriers to infection in the human body. Pick from the choices below, there maybe more then one answer. a. The low pH in the stomach kills pathogens entering the digestive system. b. The acidic surface of the skin prevents bacterial growth. c. Macrophages phagocytize pathogens in the body. d. Enzymes in tears break down pathogens that touch the eyes. e. Hairs located in the ears and nose block pathogens. f. Antibodies recognize pathogens and attack infected cells. g. Sticky mucus traps pathogens entering the respiratory system.

          Select examples of chemical barriers to infection in the
human body. Pick from the choices below, there maybe more then
one answer.
a. The low pH in the stomach kills pathogens entering the
digestive system.
b. The acidic surface of the skin prevents
bacterial growth.
c. Macrophages phagocytize pathogens in the body.
d. Enzymes in tears break down pathogens that touch
the eyes.
e. Hairs located in the ears and nose block pathogens.
f. Antibodies recognize pathogens and attack
infected cells.
g. Sticky mucus traps pathogens entering the
respiratory system.

Added by Daniel T.

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