Final answer:
If lactic acid builds up in the bloodstream as a result of exercise, peripheral chemoreceptors will stimulate the respiratory centers.
Step-by-step explanation:
When engaging in vigorous physical exercise, the buildup of lactic acid is linked to an increase in anaerobic metabolism, which raises carbon dioxide (CO2) production. Peripheral chemoreceptors detect variations in blood CO2, pH, and oxygen levels.
They are mostly found in the carotid and aortic bodies. These chemoreceptors alert the brainstem's respiratory centres when lactic acid raises CO2 and lowers pH. Increased breathing depth and rate as a result of this stimulation help to eliminate surplus CO2 and restore acid-base equilibrium.