Which of the following compounds selectively inhibits proliferation and activation of CD4+ T cells?

You are called to evaluate an 8-month-old infant with a five-day history of vomiting and diarrhea. His mother states that the infant is "not acting right." On initial observation, you note a lethargic infant with mottled skin and no spontaneous movement. Respirations are 60, unlabored. Pulse is 170 and weak. Capillary refill is 4 seconds. Extremities are cool. The ECG shows a narrow complex

tachycardia P waves are visible, and the rhythm is slightly irregular. You should: a. administer oxygen and transport. b. cardiovert at 0.5 to 1 J/kg. c. administer verapamil. d. administer 20 mL/kg lactated Ringer's solution.

Composite sealants require no mixing because they usually come in:

a. syringes with disposable applicator tips b. cartridges with a cannula for application c. single use dispensing tips d. a tube with a spreading tool