Chemoreceptors Are Very Sensitive to Changes in CO₂ Concentration in the Blood

question 48

Multiple Choice

Chemoreceptors are very sensitive to changes in CO₂ concentration in the blood. Increased CO₂ levels result in messages to the respiratory center to decrease the rate and depth of ventilation.

• A) Both statements are true.
• B) Both statements are false.
• C) The first statement is true; the second is false.
• D) The second statement is true; the first is false.

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Definitions:

Gas Exchange

The biological process by which organisms exchange oxygen and carbon dioxide with their environment, typically involving the respiratory system.

Tidal Volume

The volume of air displaced between normal inhalation and exhalation when extra effort is not applied.

Cardiac Output

The volume of blood the heart pumps through the circulatory system in one minute, an important measure of heart function and efficiency.

Stroke Volume

The amount of blood pumped by the left ventricle of the heart in one contraction, indicating the heart's efficiency in pumping.