Many other common diseases are caused by autoimmunity such as juvenile diabetes and low thyroid disease. It has been recently discovered that some persons who suffer with hives or angioedema also have an autoimmune disease. In these cases, autoantibodies have been formed that bind to the Fc-receptor on mast cells.
Lesson Summary. Chitin is a primary component in the exoskeletons of arthropods and crustaceans and is also found in the cell walls of fungi. It's a polysaccharide, and it's excreted by the epidermal cells in arthropods. But, it can't grow with the animal, so shedding becomes necessary.
1. Carbohydrates Made of carbon, hydrogen, and oxygen (Chitin also contains nitrogen). (A) Monosaccharides and Disaccharides. Examples: Glucose, Ribose, Maltose, Lactose, Sucrose Structure: Can exist as a carbon chain, or as a ring. The ring form is more stable and more prevalent at equilibrium.