Final answer:
Arsenic poisoning can disrupt Cl- ion transport in epithelial cells, leading to dehydrated mucus similar to CF.
Step-by-step explanation:
Arsenic poisoning can disrupt ATP production, leading to decreased transport of Cl- ions by epithelial cells. This can result in decreased electrolyte concentration in the mucus and retention of water into the cells. As a result, the mucus becomes dehydrated, similar to the condition seen in cystic fibrosis (CF).