You are checking the D oxygen tank in the ambulance and note that the reading on the pressure regulator reads 1,000 psi. You should recognize that the tank is:

Cell membranes are composed of three layers of fat

Indicate whether the statement is true or false

When it is established that the patient has an open airway, or a firefighter has taken measures to open the airway, the next step is to ____.

A. check the level of consciousness B. check for a pulse C. stop major bleeding D. check if the patient is breathing