Moving a finger in an "H" pattern in front of your patient's eyes tests:

On scene at a school cafeteria, you are presented with a 9-year-old boy who attempted to eat a small plum whole. He is conscious with stridorous respirations and unable to cough when instructed to do so. His skin color is gray and cyanotic. Your immediate action would be to:

A) deliver five abdominal thrusts. B) provide positive pressure ventilation. C) place an oral pharyngeal airway. D) check for a radial and carotid pulse.

The first dry chemical agents developed were borax (sodium borate) and _______________

a. monoammonium phosphate based b. dry powder based c. sodium bicarbonate based d. potassium chloride based