what decreases respiration rate
Best Answer: An increase in blood CO2 increases respiration. A decrease in blood O2 increases respiration. An increase in blood pH (meaning it becomes less acidic, more alkali) decreases respiration.A decrease in blood pH (meaning it becomes more acidic) increases respiration.The body has both peripheral (in the body) and central (in the brain) chemoreceptors that monitor levels of O2, CO2, and pH.nswers. Best Answer: An increase in blood CO2 increases respiration. A decrease in blood O2 increases respiration. An increase in blood pH (meaning it becomes less acidic, more alkali) decreases respiration. A decrease in blood pH (meaning it becomes more acidic) increases respiration.