This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
The eosinophil secrete all except 
Select and explain. 
A. Major basic protein, B. Hydrolytic enzyme, C. Reactive form of oxygen, D. Eosinophilic chemotactic factor
B: Hydrolytic enzyme
Answer: B: Hydrolytic enzyme 
Explanation: Ref Robbins 8/e p54 Hydrolytic enzymes are secreted by lysosomes lysosome (/'laIs@,soUm/) is a membrane-bound organelle found in many animal cells. They are spherical vesicles that contain hydrolytic enzymes that can break down many kinds of biomolecules. A lysosome has a specific composition, of both its membrane proteins, and its lumenal proteins.