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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.
What else can I help you with?
How is breathing affected if smooth muscle of bronchial trees relax?
When the bronchial tree relaxes, more oxygen is taken into the body and more carbon dioxide is expelled from the body.
How is breathing affected if smooth muscle of the bronchial contracts?
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.
What muscle separates the thorax and abdomen and aids in breathing?
The muscle that separates the thorax and abdomen and aids in breathing is called the diaphragm. It is a dome-shaped muscle that contracts and relaxes to regulate the volume of the thoracic cavity, allowing for inhalation and exhalation.
Which muscle relaxes when arm is strightened?
The bicep muscle. The tricep contracts to straighten the arm as the bicep relaxes.
Muscle that controls breathing as it contracts and relaxes?
The Diaphragm - a membrane of muscle and tendon, flexes to reduce ambient pressure in the thorax, and cause the lungs to compensate by drawing in air. Exhalation works in reverse.
What function does your diaphragm do in your respiratory?
The diaphragm is the primary muscle responsible for breathing. When it contracts, it moves downward, creating a vacuum in the chest cavity which draws air into the lungs. When it relaxes, the diaphragm moves back up, pushing air out of the lungs.
When one muscle contracts what dose the other muscle do?
Relaxes
As one muscle in a pair relaxes what does the otyher muscle do?
contract
What is an adjective that means pertaining to the diaphragm?
Diaphragmatic. The diaphragm, in human anatomy, is the relatively thin, curved muscle that contracts and relaxes in the work of breathing.
What is widening of the bronchial tubes?
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.
What medication relaxes muscle spasms in the bronchial tube?
Medications that relax muscle spasms in the bronchial tubes are known as bronchodilators. Common examples include beta-agonists like albuterol and anticholinergics like ipratropium. These medications work by relaxing the smooth muscles of the airways, leading to improved airflow and alleviation of symptoms associated with conditions like asthma and chronic obstructive pulmonary disease (COPD).
What is the type of muscle that squeezes and relaxes without stopping?
the smooth muscle
