Question

chemical control of respiration is directly dependent upon the level of what chemical?
a. water
b. alcohol
c. carbon dioxide

Explanation:

The chemical control of respiration is mainly dependent on the levels of carbon - dioxide in the body. Changes in carbon - dioxide levels are detected by chemoreceptors which then adjust the rate and depth of breathing. Water and alcohol do not have a direct primary role in the chemical control of respiration.

Answer:

d. Carbon dioxide