Transmembrane potential is the electrical charge at the ________

Which of the following best describes the mediastinum?

A) The space that houses the heart, aorta, and esophagus B) The fibrous sac surrounding the heart C) The space between the inner and outer lining of the lungs D) The space between the ribs and the diaphragm

A 73-year-old man presents with a generalized rash, which he thinks may have been caused by an antibiotic that he recently began taking. He has a history of coronary artery disease, hypertension, and emphysema. He is conscious and alert, his blood pressure is 144/94 mm Hg, and his pulse is 64 beats/min and regular. You auscultate his breath sounds and hear scattered wheezing, although he is not experiencing respiratory distress. In addition to administering oxygen, you should:

A. contact medical control if needed, transport the patient, and monitor him for signs of deterioration. B. ask him if he has epinephrine and request approval from medical control to administer it to the patient. C. avoid the use of epinephrine because of his cardiac history, even if his symptoms become severe. D. begin transport and request to administer epinephrine if his systolic blood pressure falls below 110 mm Hg.