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How is breathing affected if the smooth muscle of the bronchial tree relaxes?
Wiki User
∙ 8y ago
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.
Wiki User
∙ 8y ago
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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.
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.
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.
As one muscle in a pair relaxes what does the otyher muscle do?
contract
When one muscle contracts what dose the other muscle do?
Relaxes
In a muscle group the muscle that relaxes during a particular action is what?
gdg
What is the type of muscle that squeezes and relaxes without stopping?
the smooth muscle
What muscle relaxes and what muscle works?
I think what your after is called an antagonistic pair of muscles, for example the bicep and the tricep. When the bicep is contracting the tricep relaxes and when the tricep is contracting the bicep relaxes.
What does the other muscle do when one relaxes?
It Contracts
