_________ the heartbeat that pumps the blood to the lungs during respiration

Which action is most appropriate when using a helicopter on the scene of an emergency?

A) Always approach the helicopter from the front, never from behind B) Point a spotlight at the helicopter to indicate the location of the landing zone when the helicopter is on final approach C) Always approach the helicopter from behind, never from the front D) Keep all EMS and rescuer personnel at least 50 feet from the helicopter as it lands

All biopsy specimens must be placed in a preservative to prevent changes in tissues. The most common preservative is a 10% ________ solution, which is a dilute solution of formaldehyde.

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