in carbon dioxide in your tissues leads to in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up. View Available Hint(s) in carbon dioxide in your tissues leads to in pH of cerebrospinal fluid and blood, which ultimately causes your breathing to speed up. A decrease, a rise A decrease, a drop An increase, a drop Actually, it is the increase and decrease in oxygen, not carbon dioxide, that controls breathing. An increase, a rise