Which type of inflammation occurs in the synovial membrane?

Arthritis is a specific type of inflammation that affects the joints, particularly the synovial membrane, which lines the joints and produces synovial fluid. In arthritis, this membrane becomes inflamed, leading to pain, swelling, and reduced joint mobility. The inflammation can be caused by various factors including autoimmune diseases, infections, or wear and tear on the joints.

In contrast, bursitis involves inflammation of the bursa, which is a small fluid-filled sac that reduces friction between tissues such as bone and muscle. Tendonitis refers to inflammation of a tendon, the tissue that connects muscles to bones. Fibrosis is a process that leads to thickening or scarring of connective tissue and is not specifically a type of inflammation nor is it confined to the synovial membrane. Hence, arthritis is directly associated with inflammation in the synovial membrane, making it the correct answer.