The osmotic pressures in the cortex and medulla of the kidney are _____ and _____, respectively.

The regulation of potassium balance:

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

Interferons:

Trabecula.  

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

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

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

Which of the statements below does not describe antigens?

Antigen-binding site.