When the bronchial tree relaxes, more oxygen is taken into the body and more carbon dioxide is expelled from the body.
When the smooth muscle of the bronchial tree contracts it creates a high resistance to the air flow into the lungs. Breathing is affected since the balance of oxygen and carbon monoxide is off, causing a higher respiration rate.
Asthma causes contraction of the bronchial smooth muscle.
parasympathetic system (PSNS) will a)vasoconstrict the lumen of airway by contracting smooth muscle cells along the conducting passage via M3 Receptor, b)increase mucus secretion via M3 Overall it'll interfere with normal breathing pattern and obstruct normal breathing.
Smooth muscle located in the lungs
I think it's smooth muscle, which makes up the heart.
Smooth muscle in the lung encircles bronchiolar tubular passages that lead to the alveoli (you would need a microscope to see this, by the way). Constriction of the muscle would close the diameter of the bronchiolar tubes and thus create a very high resistance to airflow during inspiration to the alveoli downstream of that bronchiolar passage. Airflow would be directed to bronchiolar tubes whose diameters were enlarged because the smooth muscle is (more) relaxed. The rate of respiration (what you call breathing) is affected by a balance of oxygenation and carbon dioxide. it si the level of carbon dioxide that actually controls respiration rate (it is sensed and controlled by the nervous system). If smooth muscle is relaxed, more carbon dioxide is probably expired from the body (as well as oxygen coming in). With a reduced level of blood carbon dioxide, the autonomic nervous system would not demand a higher respiration rate. And so the person would have a lower respiration rate...fewer breaths per unit time (minute). Thus smooth muscle relaxation likely leads to a lowered breathing rate.
Bronchioles are smaller tube divisions of bronchi. Walls of bronchioles contain smooth muscle and no cartilage. This helps in contraction and relaxation which allows the flow of air to alveoli.
perhaps you mean Salmeterol which is a long acting B2 adrenergic used for Asthma because of its vasodilatory effect on bronchial smooth muscle
diaprahm i think i spelled it wrong though but that's the answer
smooth musclesmooth muscle
yes and no, the diaphragm is a smooth muscle that you can consciously control to breathe, but if you are asleep or pass out your body will unconsciously take over and start breathing for you.
Smooth muscle