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 withdrawal symptoms and cravings, reminders in your daily life of occasions when you normally chew may trigger an urge to dip. Triggers are the moods, feelings, places, or things you do in your daily life that turn on your desire to use smokeless tobacco.