Upper panel: relationship between the quenching factor QF and the specific star formation activity sSFR for the late-type galaxies of the sample with a reduced . Blue filled squares, green triangles, and red circles are for galaxies where the derived quenching factor is QF ≤ 0.5, 0.5 < QF ≤ 0.8, and QF > 0.8, respectively. Lower panel: sSFR distribution for different quenching factors.