In laminar flow, if diameter is reduced to half ?
Ans. is 'd' i.e., Blood flow decreases sixteen-foldIf everything else remains constant, blood flow is direactly poropoional to 4th power of radius.Thus, if the diameter (or radius) is reduced to half, blood flow will decrease sixteen-fold.
Blood flow increases four fold
Blood flow decreases four fold
Blood flow increases sixteen-fold
Blood flow decreases sixteen-fold