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.
Widening of the bronchial tubes, known as bronchodilation, refers to the relaxation of the smooth muscle surrounding the airways in the lungs. This allows for increased airflow and improved breathing capacity, commonly achieved through the use of bronchodilator medications such as albuterol.
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
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.
I think it's smooth muscle, which makes up the heart.
Dilation of the bronchial tubes is increased by the sympathetic nervous system. Specifically, the release of norepinephrine from sympathetic nerve endings causes relaxation of the smooth muscle in the bronchial tubes, leading to bronchodilation.
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
The bronchial walls are made up of cartilage, smooth muscle, connective tissue, and mucous-secreting cells. These components work together to provide structure, support, and regulation of airflow in the respiratory system.