1. Langerhans cells, which play a role in defense against microbes, are located in the
a. epidermis.
b. dermis.
c. hypodermis.
d. subcutaneous layer.

2. The papillary layer of the skin is part of the
a. epidermis.
b. dermis.
c. hypodermis.
d. subcutaneous layer.

3. Which of the following organisms is the causative agent of skin infections and toxic shock syndrome?
a. Pseudomonas aeruginosa
b. Staphylococcus aureus
c. Micrococcus luteus

d. Propionibacterium acnes