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.
Types of Skin Cells. However, your skin isn't a weakling, and does have a defense mechanism that tries to fight off dangerous ultraviolet rays found in sunlight. In the deepest layer of the epidermis, the stratum basale, which is also sometimes called the basal layer, are cells called melanocytes.These are cells that produce the pigment melanin. It is this substance, melanin, which determines the skin color of an individual.n addition to housing young keratinocytes and melanocytes, the basal layer of your skin also contains other cells, such as Merkel cells, which are cells that are important in the sensation of touch. With all of that in mind, I do have an important point to make.