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.  

Which of the following is true about the number of binding sites per functional antibody unit?

The eye muscle that elevates and turns the eye laterally is the:

A simple spinal reflex goes along which of the following reflex arcs?