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
All the following that act as ionic channels except 
Select and explain. 
A. Nicotine, B. Insulin, C. Glibenclamide, D. Diazepam
B: Insulin
Answer: B: Insulin 
Explanation: Nicotin acts on NN and NM receptor which are Ino tropic receptors Diazepam act on GABA-BZD CL channel Complex that mediates entry of chlori Glibenclamide is a sulpforylchloride that act on ACh sensitive K+ channel Insulin act on enzymatic receptors Ref-KDT 7/e p49