The skin is an effective barrier to pathogens in which of the
following ways?
1. Leukocytes are closely associated on the skin
surface
2. the surface cells continually fall off making it difficult
for pathogens to gain a foothold
3. the pH of the skin is normally acidic
4. The salt content of the skin is high
5. Sebum and sweat contain substances that inhibit the growth of
most pathogens
Either 1,2,3,4,5 OR 2,3,4,5