Question

Inhalation and exhalation of air is an involuntary process controlled by​

Answer 1

Answer:

Breathing is usually automatic, controlled subconsciously by the respiratory center at the base of the brain. Conversely, when the carbon dioxide concentration in the blood is low, the brain decreases the frequency and depth of breaths. ...

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Answer 2

The work of breathing is done by the diaphragm, the muscles between the ribs (intercostal muscles), the muscles in the neck, and the abdominal muscles. ... During vigorous exercise, however, a number of muscles participate in exhalation. The abdominal muscles are the most important of these.

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