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The cells producing the pigment responsible for skin color are called what? Melanocytes Cells of the skin's epidermis that participate in the immune response to microbes are called what? Langerhans cells The only layer of the epidermis that contains stem cells capable of continued cell division is what? Stratum Basale The clear layer of the epidermis that is only found in the thick skin located in areas such as the fingertips, palms and soles is called what? Stratum Lucidum What are the pigments that contribute to the color of an individual's skin?
These two types of lymphocytes --- cells and T cells --- play different roles in the immune response, though they may act together and influence one another's functions. The part of the immune response that involves B cells is often called humoral immunity because it takes place in the body fluids.ntigens are not the foreign microorganisms and tissues themselves; they are substances --- such as toxins or enzymes --- in the microorganisms or tissues that the immune system considers foreign. Immune responses are normally directed against the antigen that provoked them and are said to be antigen-specific.