How many vertebrae are there in the cervical spine?

A secondary power supply system for a fire detection and alarm system must be able to make the system fully operational within:

A. 10 seconds of the main power supply's failure. B. 30 seconds of the main power supply's failure. C. 60 seconds of the main power supply's failure. D. 90 seconds of the main power supply's failure.

What is minimum recommended volume of anesthetic solution administered for a lingual nerve block?

A) 0.2 mL B) 0.6 mL C) 0.9 mL D) 1.5 mL