What physiological effect does hydrogen sulphide have on the respiratory system?

Hydrogen sulphide (H2S) is a highly toxic gas that can have severe effects on the respiratory system. When inhaled, it can lead to irritation of the mucous membranes throughout the respiratory tract. Symptoms such as coughing, difficulty breathing, and a sensation of irritation in the throat and lungs are common due to the gas's corrosive nature.

In higher concentrations, hydrogen sulphide can cause more serious damage to the respiratory system, including pulmonary edema or fluid accumulation in the lungs, which can significantly impair respiratory function. This toxicity is due to the gas's ability to hinder cellular respiration, disrupting the oxygen transport mechanism in the body and leading to potentially life-threatening conditions.

Therefore, the physiological effect of hydrogen sulphide on the respiratory system is characterized by irritation and the potential for serious damage, which aligns with the understanding of its toxicological profile.