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What tends to decrease airway resistance? a) acetylcholine release b) asthma c) exhalation to residual volume...

What tends to decrease airway resistance?

a) acetylcholine release

b) asthma

c) exhalation to residual volume

d) histamine release by mast cells

e) sympathetic stimulation

Science   Anatomy-And-Physiology   
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Answer #1

e) Sympathetic stimulation

Explanation: Sympathetic stimulation through adrenergic beta 2 receptors located on the bronchi results in bronchodilation leading to increase diameter of the airway that decreases the airway resistance and hence increases the airflow.

Parasympathetic stimulation causes the bronchoconstriction. This decreases the airflow and increases the airway resistance.

Asthma is the allergic condition that causes bronchoconstriction.

histamine also causes bronchoconstriction.

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