The central chemoreceptors for respiration are located in the ________; they monitor the blood concentration(s) of ________.

A) pons; oxygen
B) medulla oblongata; carbon dioxide and hydrogen ions
C) aortic and carotid arteries; oxygen
D) pons; carbon dioxide and hydrogen ions
E) medulla oblongata; oxygen

Central Chemoreceptors

Sensory receptors located in the central nervous system that primarily detect changes in the acidity (pH) of cerebrospinal fluid.

Medulla Oblongata

The lower portion of the brainstem, controlling vital bodily functions such as breathing, heart rate, and blood pressure.

Carbon Dioxide

A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in air and is absorbed by plants in photosynthesis.