Parameter values are ρ= 5, β= 20, d = 0.01, a = 5, k = 0.5, b = 5, η = 1.2, h = 0.5, γ = 2, ε = 1.95, u = 0.25. States shown are x, y, v. Values are scaled by 1010 to correspond to number of cells. For constant u, r exponentially converges to its steady state value. Plot on left is log-scale. Trajectories converge in an oscillatory fashion to a stable steady state.