When a portion of the lung is unavailable for gas exchange, yet pulmonary circulation continues in that area of the lung, a condition known as ________ results

A physician is described as extending a ________ when he or she provides medical services to other physicians for free or at a reduced rate

A) hardship agreement B) dual fee schedule C) national standard D) professional courtesy

Most water snakes are very aggressive

Indicate whether the statement is true or false