Problem: Which of the following are examples of non-specific immune defenses? (Select all that apply)
Group of answers:
1. lactic acid in sweat
2. HCl in gastric secretions
3. the humoral immune response
4. lysozyme in mucous membranes
5. acquired immunity
6. native bacteria in the vagina
7. neutrophils phagocytizing bacteria
8. inflammation at the site of a tissue injury
9. plasma cells manufacturing antibodies