Procedure of surgically removing an entire lung:

The electrical impulses responsible for the cardiac cycle that appear on an electrocardiogram as peaks and valleys are called ________.

A. probes B. leads C. electrodes D. styluses E. deflections

Healthcare expenditures by Americans were approximately ____ trillion dollars in 2009.

A. 1.2 B. 2.0 C. 2.5 D. 3.0