A client is brought into the ER with rapid, deep respirations at a rate of 25 breaths per minute and decreased level of consciousness. A stat MRI shows a lesion in the brain stem that may have infiltrated which regulator of respiratory function responsible for detecting changes in carbon dioxide levels?

a. Central chemoreceptors

b. Stretch receptors

c. Peripheral chemoreceptors

d. Juxtacapillary receptors