A(n) __________ has purple-black granules that obscure the cytoplasm, whereas a(n) __________ contains granules that orange to red in color

The recommended dose of Lanoxin is 0.25–1.0 mg IV. At doses in excess of 1.5 mg, Lanoxin becomes toxic. A drug's margin of safety—the range between an effective dose and a lethal dose—is known as the:

A) physiologic dosing regimen. B) drug toxicity level. C) therapeutic index. D) none of the above

For infection to occur, each of the following conditions must be present EXCEPT one. Which one is the EXCEPTION?

a. An appropriate portal of entry into the host b. A pathogen c. An acceptable barrier d. A susceptible host