Question

Physical barriers that help prevent an individual from contracting diseases include _________.

1) blood cells, enzymes, tears, and skin
2) stomach acid, skin, and mucus membranes
3) tears, skin, and mucus membranes
4) enzymes, mucus membranes, stomach acid, and tears

Answer 1

Physical barriers that help prevent an individual from contracting diseases include stomach acid, skin, and mucus membranes. So, the correct answer is option 2

Step-by-step explanation:

Physical barriers that help prevent an individual from contracting diseases include stomach acid, skin, and mucus membranes. The skin is a mechanical barrier that is difficult for pathogens to penetrate. Stomach acid creates a highly acidic environment that kills many pathogens entering the digestive system. Mucus membranes, such as those in the respiratory tract, trap and rinse away pathogens.

So, the correct answer is option 2.