Biology for IGCSE & O level - Gas Exchange In Humans (Section 2 - No. 10)
Which of the following is a factor that increases the rate of breathing?
Low levels of carbon dioxide in the blood.
Increased metabolic demand during exercise.
High levels of oxygen in the blood.
Relaxation of intercostal muscles.
Explanation
Increased metabolic demand increases the need for oxygen and the rate of breathing.
Comments (0)
