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How is breathing affected if smooth muscle of bronchial tree relaxes?

Answer

when the bronchial tree relaxes more oxygen is taken into the body and more carbon dioxide is expelled from the body.
Q&A Related to "How is breathing affected if smooth muscle of..."
When the smooth muscle of the bronchial tree relaxes the bronchi open or dilate. When the space that the air flows through the movement is less turbulent and therefore more air can
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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
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