In chronic hepatitis, which of the following is typically observed?

In chronic hepatitis, increased alkaline phosphatase is a typical observation due to the impact of liver disease on bile flow. Alkaline phosphatase is an enzyme found in various tissues including the liver, bile ducts, and bones, with elevated levels often indicating cholestasis or bile duct obstruction. In chronic hepatitis, inflammation and damage to hepatic cells can lead to disruptions in bile flow, resulting in higher levels of alkaline phosphatase in the serum.

The other options do not characteristically reflect the pathophysiological changes associated with chronic hepatitis. For instance, as the disease progresses, liver cell damage typically results in the elevation of AST and ALT, not a decrease. Serum glucose levels may vary, but hyperglycemia is not a hallmark of chronic hepatitis; instead, glucose dysregulation can happen, particularly in advanced liver disease. Increased lactate levels are more commonly associated with conditions of hypoxia or metabolic disturbances rather than chronic hepatitis per se. Therefore, the increase in alkaline phosphatase is a key marker in the assessment of liver function and pathology in chronic hepatitis.