Final answer:
The formation of thick mucus in the lungs leading to pancreatic obstruction is a serious health problem associated with cystic fibrosis.
Step-by-step explanation:
True. One of the most serious health problems associated with cystic fibrosis is the formation of thick mucus in the lungs, which may lead to pancreatic obstruction. The mutated gene in cystic fibrosis causes the body to produce unusually thick and sticky mucus that clogs the airways and obstructs the pancreas, hindering the absorption of nutrients.