Q1 Which white blood cell assists in the regulation of the immune response? Neutrophil Null cell B lymphocyte T suppressor Q2- Cilia and mucus in the respiratory tract, which prevent bacteria from establishing infection, are both examples of inflammatory mechanisms. humoral immunity. acquired immunity. innate immunity. Q3- Those bacteria that can use aerobic respiration or fermentative processes for metabolism are categorized as: microaerophiles. obligate aerobes. obligate anaerobes. facultative anaerobes. Q4- Gram negative bacteria contain ________, which are not found in gram positive bacteria. capsules periplasmic space and an outer membrane teichoic acids cross-linked peptidoglycan inflammatory mechanisms. humoral immunity. acquired immunity. innate immunity..