You are carrying a firearm. Before crossing a fence, the first two thing you should do is:

Elderly patients are more susceptible to serious infections and diseases, such as cancer, as a result of reduced host de-fenses due to alterations in:

A. cognitive function B. T-lymphocyte function C. mast cells D. cardiovascular strength

You and your partner are called to the home of a 50-year-old male. His breathing is labored and difficult, and he is complaining of feeling suffocated. He is sitting in the tripod position and his skin is cyanotic. You recognize these signs and symptoms of:

A. hyperventilation. B. respiratory compromise. C. COPD. D. sleep apnea.