The Pathway. 1  Air enters the nostrils. 2  passes through the nasopharynx, 3  the oral pharynx.  through the 1  glottis. into the trachea.  into the right and left bronchi, which branches and rebranches 1  into. bronchioles, each of which terminates in a cluster  of. alveoli.
As the body adjusts to less caffeine, these symptoms should subside. Nicotine May Cause Less Sleep. Nicotine is also a stimulant, and nicotine side effects can cause insomnia and withdrawal symptoms similar to caffeine. Smoking may also create other sleep disturbances.
In addition to nicotine cravings, reminders in your daily life of times when you used to smoke may trigger you to smoke. Triggers are the moods, feelings, places, or things you do in your daily life that turn on your desire to smoke.ommon withdrawal symptoms associated with quitting include the following: 1  Nicotine cravings (nicotine is the substance in tobacco that causes addiction). 2  Anger, frustration, and irritability. 3  Anxiety. 4  Depression.