This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
Mesangial cells are contracted by 
Select and explain. 
A. Histamine, B. Nitric oxide, C. Bradykinin, D. Dopamine
A: Histamine
Answer: A: Histamine 
Explanation: Contraction Relaxation Endothelins ANP AngiotensinII Dopamine Vasopressin PGE2 Norepinephrine cAMP Platelet-activating factor Platelet-derived growth factor Thromboxane A2 PGF2 Leukotrienes C4 and D4 Histamine Ref: Ganong's Review of medical physiology 25th edition. Page: 678 Table 37-3