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Bronchoconstriction of smooth muscles is...

Bronchoconstriction of smooth muscles is witnessed by asthma patients . It is triggered due to release of ..X.. and treated by ....Y...

A

X- histamine , Y-aldosterone

B

X- antihistamine Y - epinephrine

C

X- antihistamine Y - prednisolone

D

X- histamine , Y- adrenaline

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding bronchoconstriction in asthma patients, we need to identify two key components: the trigger (denoted as X) and the treatment (denoted as Y). ### Step-by-Step Solution: 1. **Understanding Bronchoconstriction**: - Bronchoconstriction refers to the tightening of the smooth muscles surrounding the airways, which can lead to difficulty in breathing. This condition is commonly observed in asthma patients. 2. **Identifying the Trigger (X)**: - In asthma, bronchoconstriction is primarily triggered by the release of certain substances. One of the main substances involved in this process is **histamine**. Histamine can cause bronchoconstriction by acting on H1 receptors located on airway smooth muscle (ASM) or by stimulating afferent vagal fibers. 3. **Identifying the Treatment (Y)**: - The treatment for bronchoconstriction in asthma often involves the use of **adrenaline** (also known as epinephrine). Adrenaline works by stimulating beta-adrenergic receptors, leading to bronchodilation (the widening of the airways), and it also has effects that reduce microvascular leakage. 4. **Finalizing the Answer**: - Based on the above understanding, we can conclude that: - X (the substance that triggers bronchoconstriction) is **histamine**. - Y (the treatment for bronchoconstriction) is **adrenaline**. ### Final Answer: - X = Histamine - Y = Adrenaline
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