How is blood flow through an organ regulated and calculated, and how does venous pressure factor into this?
a) Blood flow is regulated by cardiac output alone;,venous pressure does not affect it.
b) Blood flow is regulated by the diameter of arterioles;,venous pressure is calculated based on capillary permeability.
c) Blood flow is regulated by changing the diameter of arterioles and is calculated using the equation: Blood Flow = (Arterial Pressure - Venous Pressure) / Resistance,venous pressure is the back pressure that affects blood return to the heart.
d) Blood flow is solely determined by the force of ventricular contraction, venous pressure is irrelevant to blood flow.