The diagnosis of Cushing syndrome is often based on:

A. Mucous obstruction is a secondary effect of cystic fibrosis, but it is not the primary cellular issue. The root cause lies in the dysfunction of chloride transport, which leads to thick, sticky mucus that obstructs various organs.

B. The primary problem in cystic fibrosis is a defect in the CFTR (cystic fibrosis transmembrane conductance regulator) protein, which disrupts electrolyte and water transport across cell membranes. This causes thickened mucus and affects the lungs, pancreas, liver, and intestines.

C. Infection is a common complication in cystic fibrosis due to the buildup of thick mucus, which can trap bacteria, but it is a consequence rather than the primary issue.

D. Pancreatitis is a potential complication of cystic fibrosis due to the blockage of pancreatic ducts, but it is not the major cellular issue.

A. While inflammation plays a role in restoring functional cells, it is not the ultimate goal. The primary purpose of inflammation is to prepare the site for healing, which includes clearing out damaged cells and pathogens.

B. Inflammation is a vital process that helps prepare the site for healing by facilitating the removal of dead tissue and pathogens, allowing for tissue repair. It also promotes the formation of new tissue.

C. Platelet aggregation and clotting are part of the inflammatory process, but the ultimate goal of inflammation is not to increase platelets but to prepare the site for repair and healing.

D. Inflammatory mediators typically cause vasodilation to increase blood flow to the affected area, not vasoconstriction. This helps deliver nutrients, oxygen, and immune cells to the site of injury.