Question

If the chemical control system detects a rise in the blood level of CO2, it signals the respiratory center to ______________ the rate and depth of respiration.

a. Increase
b. Decrease
c. Maintain
d. Stabilize

Answer 1

When the chemoreceptors detect a rise in CO2 levels in the blood, they trigger an increase in the rate and depth of respiration to efficiently expel CO2 and maintain blood pH levels.

If the chemical control system detects a rise in the blood level of CO2, it signals the respiratory center to Increase the rate and depth of respiration.

so the correct answer is Option A. Increase

Step-by-step explanation:

If the chemical control system detects a rise in the blood level of CO2, it signals the respiratory center to increase the rate and depth of respiration. The body's chemoreceptors monitor the levels of CO2 and trigger changes in respiration. A rise in carbon dioxide concentration—or a decrease in pH due to increased carbonic acid production— stimulates both central chemoreceptors located in the medulla oblongata and peripheral chemoreceptors in the aortic arch and carotid arteries. These receptors send signals to the respiratory centers in the brain, which result in an acceleration of breathing rate and depth. This response ensures that CO2 is expelled more efficiently, thereby reducing its concentration in the blood and returning the pH to normal levels.

so the correct answer is Option A. Increase