In PNH, cells are susceptible to complement-induced lysis. This is thought to result from the lack of what two regulating factors?

Many medical offices change ________ every 60 to 90 days for added security

a. computers b. software c. passwords d. employees

Ideally an LZ should be flat (horizontal) or have a slope that is less than or equal to:

a. a 4-degree pitch. b. a 6-degree pitch. c. an 8-degree pitch. d. a 12-degree pitch.