24%-answer: b
(katzung, pp 418, brunton, pp 374)
all local anesthetics, but benzocaine, are weak bases and therefore they are mainly ionized when
their pka is higher than the ph of the body fluids,...Read More
Receptor binding-answer: d
(katzung, pp 418, brunton, pp 371)
local anesthetics are weak bases and in the in the body fluids they exist either as the uncharged
base (nonionized form ) or as a cation...Read More
Bupivacaine-answer: e
(katzung, pp 426, brunton, pp 377)
most local anesthetics can block na+ channels in cardiac muscle and thus they can depress
automaticity and conduction. at very high doses...Read More
