________ are layers of cells that cover internal or external surfaces

Which of the following cells released from the islets of Langerhans produce glucagon, which increases the blood glucose levels?

A) Alpha cells B) Beta cells C) Gamma cells D) Delta cells

You arrive at the scene of a 56 year old man who is not breathing. Your initial assessment reveals that the patient is pulseless and apneic. The patient's wife tells you that her husband suddenly grabbed his chest and then passed out. As your partner confirms cardiac arrest and begins one-rescuer CPR, you should

A. notify medical control B. insert an airway adjunct C. prepare the AED for use D. obtain a SAMPLE history