Q:

Bronchial smooth muscle contracts in response to

safaTerkawi
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2022-08-08
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 Bronchial smooth muscle contracts in response to.

  1. Bronchial mucosal irritation.
  2. Local beta adrenoceptor stimulation.
  3. A fall in bronchial PCO2.
  4. Inhalation of cold air.
  5. Circulating noradrenaline.
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safaTerkawi
2022-08-08
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A. True Via a reflex with a parasympathetic efferent pathway.

B. False This leads to relaxation.

C. True This tends to limit local overventilation.

D. True This is minimized normally by the warming of air in the upper airways.

E. False This causes relaxation via beta receptors.

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