When the body first encounters a foreign antigen, a primary immune response is stimulated. One of the residual effects of the primary response is the retention of which memory cells?

All of the following are used for smoking cessation EXCEPT:

a. Bupropion. b. Varenicline. c. Nicotine polacrilex. d. Naltrexone.

Which of the following statements regarding builder's hardware used on fire doors is MOST accurate?

A) Builder's hardware is used on sliding fire doors. B) Builder's hardware includes hinges, locks, and closers. C) Builder's hardware must be inspected by the fire inspector before installation. D) Builder's hardware must be shipped with the fire doors.