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: Biochemistry
Blood is not a newtonian fluid because: 
Select and explain. 
A. Viscosity does not changing with velocity, B. Viscosity changes with velolcity, C. Density does not change with velocity, D. Density changes with velocity
B: Viscosity changes with velolcity
Answer: B: Viscosity changes with velolcity 
Explanation: Blood is a non Newtonian fliud. Blood viscosity increases as the velocity decreases. Ref: Biofluid Mechanics By Jagannath Mazumdar, Page 79