The urinary bladder is composed of ________ epithelium.

The regulation of potassium balance:

________ determine(s) which antigens our adaptive immune system will be able to recognize and resist.

The distal portion of the small intestine contains clumps of lymph nodules called:

Trabecula.  

Interferons:

Antigen-binding site.  

Which of the statements below does not describe antigens?

The only T cells that can directly attack and kill other cells are the:

Molecules that do not require carrier proteins to produce an immune response are called: