Nicotine is the addictive substance found in tobacco. Judging from your vague question- Nicotine is inhaled by the user and that of the smoking affects others as well.
it causes breathing to become shallow
Nicotine. Sugar is not addicting. It is the object of a compulsion, but the compound itself is not involved in the dependency, which is emotional in origin.
breathing!
A reverberating circuit is involved in the control of rhythmic activities such as breathing.
The primary nerves involved in breathing are the phrenic nerve and the intercostal nerves. The phrenic nerve controls the diaphragm, the main muscle involved in breathing, while the intercostal nerves control the muscles between the ribs that help with the mechanics of breathing.
Breathing.
nicotine
nicotine
Nicotine is primarily extracted from the leaves of the tobacco plant. The process involves harvesting the leaves, drying them, and then using a solvent like ammonia to extract the nicotine. The extracted nicotine is then purified through a series of chemical processes to remove impurities and create a concentrated form of the substance.
These are diaphragm and externa intercostal muscles in quiet breathing and sternocliedomastoid ,sclene muscles,anterior serrati in heavy breathing
The oral cavity is involved in breathing through the pharynx, or throat, which connects the nasal cavity to the larynx and trachea. The opening and closing of the jaw also play a role in breathing by allowing for air intake and exhalation.
Nicotine stimulates the release of adrenaline, also known as epinephrine, in the body. This hormone increases heart rate, blood pressure, and breathing rate, leading to the characteristic "fight or flight" response.