What type of mucus is thick and white, produced by White Blood Cells in response to inflammation?

The type of mucus that is thick and white, often produced by white blood cells in response to inflammation, is classified as catarrhal mucus. This type of mucus is typically associated with inflammatory conditions, particularly in the respiratory system, where it serves as a protectant and helps to trap pathogens and debris. The composition of catarrhal mucus involves an increased number of mucin-producing cells, which leads to its thicker consistency and opacity.

In contrast, the other types of mucus listed have different characteristics and implications in the context of inflammation. Mucosal mucus generally refers to the normal secretions from mucosal surfaces that are more fluid and less concentrated. Serous mucus, which is typically thin and clear, is produced during acute inflammatory responses, resembling a more watery secretion. Fibrinous mucus contains a high level of proteins, particularly fibrinogen, and tends to be associated with severe inflammation or tissue damage, leading to the formation of a fibrinous exudate. Thus, catarrhal mucus uniquely addresses the thick and white characteristics seen in inflammatory responses, distinguishing it from the other options provided.