Q:

With respect to adrenaline and noradrenaline, which of the following is true? They:

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With respect to adrenaline and noradrenaline, which of the following is true? They:


  1. Relax smooth muscle resulting in dilation of the airways
  2. Contract smooth muscle resulting in constriction of the airways
  3. Relax smooth muscle resulting in constriction of the airways
  4. Have no effect on the bronchioles

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A: Adrenaline & noradrenaline cause bronchioles to dilate which allows for greater ventilation.  

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