Approximately ____ percent of the geographic United States is covered by some type of 9-1-1.

Which one of the following statements about the P wave is TRUE?

A) It represents ventricular depolarization. B) It is a rounded wave appearing after the QRS complex. C) It follows the R wave on normal ECGs. D) It corresponds to atrial depolarization.

What path is taken for the middle fossa approach to an ear procedure?

A) through incision and into the skull. B) through incision and behind the ear. C) through incision with removal of the bony labyrinth. D) through incision and partial removal of the bone above the ear.