Physical and chemical barriers that form the first line of innate defense include:

Question

Quizplus · Accepted Answer

All of the options listed are physical and chemical barriers that form the first line of innate defense, making option E the correct choice. The acidity of the stomach helps to kill pathogens, tear fluid from the eye contains enzymes that can break down bacteria, an un-punctured skin acts as a physical barrier to prevent pathogens from entering the body, and mucus and cilia in the respiratory tract trap and remove pathogens.

Physical and Chemical Barriers That Form the First Line of Innate