Question

Which of the following local hormone stimulates the contraction in smooth lining of bronchioles?

• A. Secretin
• B. Gastrin
• C. Leukotriene
• D. None of the above

Answer 1

The correct option is C Leukotriene

The leukotrienes are called as the inflammatory molecules which are also called as the local hormones. These are the molecules which are released by the cells like macrophages, mast cells and other immune cells in response to the pathogenic antigen. These molecules are released during the allergic reactions. The molecules causes the narrowing of the tracheal and the bronchial tubes. This results in the blockage of the passage of airway. Excess of the leukotriene release may cause asthma.

Thus, the correct answer is option C.