The term ZBA (Zero Balance Account) is sometimes used to describe a transit account. In reality, ZBAs are a completely different story and are usually used in an acquiring and merchant account context, where one party opens the account and another sweeps (clears) it daily.
Helper T cells are the major driving force and the main regulators of the immune defense. Their primary task is to activate B cells and killer T cells. However, the helper T cells themselves must be activated.
Epidermal dendritic cell that functions as an antigen-presenting cell during an immune response. Arise from red bone marrow and migrate to the epidermis, where they constitute a small fraction of the epidermal cells. They participate in immune responses mounted against microbes that invade the skin, and are easily damaged by UV Light. Merkel Cells (help make 2%) Type of cell in the epidermis of hairless skin that makes contact with a merkel disc, which functions in touch. Located in the deepest layer of the epidermis, where they contact the flattened process of a sensory neuron called tactile disc.