Biochemistry miscellaneous 9e6d3c1e In the upright position, from apex to base of the lung A Ventilation decreases, perfusion decreases B Ventilation decreases, perfusion increases C Ventilation increases, perfusion increases D Ventilation increases, perfusion decreases High-Yield Explanation Ventilation, as well as perfusion in the upright position, declines in a linear fashion from the bases to the apices of the lungs.