Question

An INCREASE in which of the following would increase blood flow in a vessel?

		Arterial pressure
		Resistance
		Venous pressure
		None of the above

A change in which factor is likely to MOST greatly impact blood flow in a vessel?

		Length
		Pressure difference
		Radius
		Viscosity

Answer 1

1.None of the above

Arterial pressure and venous pressure alone cannot cause blood flow in a vessel

The pressure difference between both the pressure cause blood flow in a vessel

As resistance increases blood pressure increases but blood flow decreases

Blood flow rate is determined by

Blood flow rate= Pressure difference%Resistance

2.Viscosity

The viscosity of blood has a dramatic effect on blood pressure and flow.

Consider a difference in flow between water and honey.The more viscous honey would has a greater resistance to flow than less viscous water.

The same principle applies to water,so it has great impact of blood flow in a vessel