Answer:
Abnormal chloride channel proteins allow increased sodium and water reabsorption
Step-by-step explanation:
Persons with cystic fibrosis have a defective CFTR gene. The causes the abnormal development of the cystic fibrosis transmembrane conductance regulator protein that is responsible for balancing water and salts across the membrane especially in epithelial cells that produce mucus and sweat and secretory enzymes. This causes the production of abnormally thick secretions that block the ducts.