This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
Insulin acts by stimulation of: 
Select and explain. 
A. Ionotropic receptor, B. Enzymatic receptor, C. Metabotropic receptor, D. Nuclear receptor
B: Enzymatic receptor
Answer: B: Enzymatic receptor 
Explanation: (Ref: KDT 6/e p258) Insulin acts by stimulation of tyrosine kinase receptors.