Question

Chemical barriers in human include_______.

• A. Tears and faeces
• B. Tears and urine
• C. Tears and breast milk
• D. None of these

Answer 1

The correct option is C

Tears and breast milk

Chemical barriers in human include tears, breast milk, sweat, saliva, stomach acid. Chemical barriers are very important in the body as they protect it from harmful foreign pathogens through chemical reactions that end up destroying the foreign threat.