Macrophages and neutrophils express several enzymes that are involved in biochemical mechanisms that kill ingested microbes. Which of the following is NOT an enzyme expressed by these cells?
A. Inducible nitric oxide synthase (iNOS)
B. Granzyme B
C. Phagocyte oxidase
D. Myeloperoxidase
E. Lysozyme

Explanation:

Granzyme B is a type of serine protease that is present in granules cells such as cytotoxic T cells and natural killer cells. This enzyme plays an important role in the process of mediate apoptosis.  

      Neutrophils are a type of white blood cell that plays an important role in immunity. These cells produce many enzymes such as Myeloperoxidase, Lysozyme, Hydrolases and some other.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: