FIGURE 6:

(a) Flow induced by MT growing against a barrier and (b) flow induced by a cargo-carrying dynein walking on a MT as simple representations of the cortical pushing and cytoplasmic pulling mechanisms. The induced flows are all three dimensional and are presented only in the plane of the MT and the direction of its motion for visualization. The solid curved lines are the flow streamlines. The arrows tangent to the streamlines are the velocity vectors. The size of the arrows and the background contour plot correspond to the magnitude of fluid velocity. The vectors with only an arrowhead in b correspond to nearly zero fluid velocity, as evident from the contour plot. The maximum and minimum in the color bar in b correspond to the velocity of the cargo and the MT in the x-direction, respectively.