Which organ is stimulated during the alarm phase of the general adaptation syndrome (gas)?

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.