Describe the process of inhalation and exhalation with regard to the contraction of the diaphragm – which is an active process and which is passive?

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04-08-2016
Chemistry

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Describe the process of inhalation and exhalation with regard to the contraction of the diaphragm – which is an active process and which is passive?

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meerkat18 meerkat18 · Answer 1 · 2016-08-08T08:17:24+02:00

Inhalation is the process of taking air into the lungs. For this to occur, the air pressure inside the lungs must be lower than that of the external atmosphere as air flows from areas of higher pressure to lower pressure. Exhalation is the process of expelling air out of the lungs. For this to occur, the air pressure inside the lungs must be higher than that of the external atmosphere as air flows from areas of higher pressure to ones of lower pressure.