This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Hydroxyethyl starch is a 
Select and explain. 
A. Vasodilator, B. Inotrope, C. Plasma expander, D. Diuretic
C: Plasma expander
Answer: C: Plasma expander 
Explanation: C i.e. Plasma expander Plasma expanders are high molecular weight substances which exe colloidal osmotic pressure and when infused intravenously retain fluid in the vascular compament.Substances em lo ed as Plasma expanders include Human albuminDextran QHydroxyethyl starch (Hetastarch) QDegraded gelatin polymerPolyvinyl pyrrolidane