_______________ is a measurement of the partial pressure of carbon dioxide in a gas sample.

A 56-year-old man with a history of cardiac problems reports pain in the upper midabdominal area. This region of the abdomen is called the

A. peritoneum B. epigastrium C. mediastinum D. retroperitoneum

______________ is an enzyme that breaks down the antibiotic penicillin and is secreted only when penicillin is present in the body

Fill in the blank(s) with correct word