Answered

Sympathetic input to the smooth muscle tissue in bronchioles causes all of the following except:

A. less airway resistance.
B. relaxation.
C. bronchoconstriction.
D. a bigger lumen.
E. activation of beta-two receptors.



Answer :

GinnyAnswer

Final answer:

Sympathetic input in bronchioles leads to bronchodilation, reducing airway resistance and promoting relaxation, except for causing a bigger lumen.


Explanation:

Sympathetic input to the smooth muscle tissue in bronchioles causes all of the following except:

  1. Less airway resistance
  2. Relaxation
  3. Bronchoconstriction
  4. A bigger lumen
  5. Activation of beta-two receptors

In this context, sympathetic input leads to bronchodilation, which results in a bigger lumen, reducing airway resistance and promoting relaxation. The activation of beta-two receptors is also associated with smooth muscle relaxation in the bronchi. Therefore, the correct answer to the question is the option mentioning a bigger lumen.


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