In the model of low-energy quantum gravity by the author , cosmological redshifts are caused by interactions of photons with gravitons . Non-forehead collisions with gravitons will lead to an additional relaxation of any photonic flux . Using only the luminosity distance and a geometrical one as functions of a redshift in this model , theoretical predictions for galaxy number counts are considered here . The Schechter luminosity function with \alpha = -2.43 is used . The considered model provides a good fit to galaxy observations by Yasuda et al . ( AJ , 122 ( 2001 ) 1104 ) if the same K-corrections are added . It is shown that observations of N ( z ) for different magnitudes m are a lot more informative than the ones of N ( m ) .