Final answer:
Consuming theophylline leads to airway dilation and improved breathing due to its effects on the central nervous system and muscle relaxation.
Explanation:
The effect of consuming the plant chemical theophylline is dilation of the airways and easier breathing. Theophylline, similar to other methylxanthines like caffeine and theobromine, acts by stimulating the central nervous system, cardiac muscle, and relaxing bronchial muscle, leading to improved breathing. It also triggers vasoconstriction in less essential organs, resulting in various effects like dry mouth and decreased appetite.
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