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.
What is the role of sustentacular cells in the olfactory epithelium? A. produce new bipolar receptor cells. B. to oxidize volatile hydrophobic odorant molecules to make them less soluble. C. to repair damaged receptor cells. D. to form basal stem cells