Question

1. which of the following does the immune system target in rheumatoid arthritis?

cartilage
beta cells
synovium
gluten

Explanation:

Rheumatoid arthritis is an autoimmune disease. In this condition, the immune system mistakenly attacks the synovium (the lining of the membranes that surround joints). Cartilage damage occurs as a secondary effect due to synovium inflammation. Beta cells are targeted in type 1 diabetes. Gluten is related to celiac disease.

Answer:

synovium