Which law best explains the basic operation of the negative pressure ventilator?

Which statement correctly describes one precaution when using 4% local anesthetic drugs for palatal injections?

A) Deposit 0.4 mL over forty seconds B) Deposit approximately twice as slowly as for 2% solutions C) Use a 4% solution without a vasoconstrictor D) Do not use 4% local anesthetic drugs for palatal injections

The EMT is properly assessing for a spinal cord injury when she:

A) Asks the patient if he has pain anywhere along his spinal column B) Palpates the entire spinal column for tenderness C) Asks the patient to spread his fingers apart on both hands D) Checks for distal pulses in all four extremities