Final answer:
The second step in the jaw-thrust-without-head-extension maneuver is to use the fingers to lift the jaw.
Step-by-step explanation:
The second step in the jaw-thrust-without-head-extension maneuver is to use the fingers to lift the jaw. This maneuver is used for opening the airway in a person who may have a potential neck injury. By gently lifting the jaw with the fingers, the airway can be opened without extending the head and potentially causing further injury.