The function of Langerhans cells in the dermal layer is to: A) increase blood circulation to the skin.
B) reduce heat loss of the skin.
C) reduce water loss of the skin.
D) increase the immune response of the skin.

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer