What is the correct abbreviation for potassium?

Platelets undergo a shape change when they come into contact with exposed ____________________.

Fill in the blank(s) with the appropriate word(s).

When suctioning the airway of a child, you should:

A. provide continuous suctioning until the airway is clear. B. suction for 10 seconds and reassess the child's airway. C. insert the catheter well beyond the base of the tongue. D. suction in a circular motion while inserting the catheter.