The organ where gas exchange takes place is the:

What set the stage for the passage of the Medicare drug benefit?

A) AARP's early endorsement of the Democratic drug plan B) a federal budget surplus and skyrocketing drug costs C) strong agreement of Democratic and Republican party leaders on its necessity D) President Clinton's concerns regarding his 2004 reelection bid

Which of the following is the minimum needle length recommended for intramuscular administration of the influenza vaccine to an adult woman weighing 215 lbs?