How does the exchange of gases take place in the alveoli of lungs?

Through imbibition

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Through active transport

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Through osmosis

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Through diffusion

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Solution

The correct option is D Through diffusion
Diffusion is the movement of molecules from higher concentration to lower concentration. The inhaled oxygen diffuses into the blood vessels from alveoli. The blood vessels carry the oxygen away from the lungs and further diffuse oxygen into the various tissues of the body. Carbon dioxide is a waste product, diffused away from the tissues and taken back to the lungs and is eliminated from the body when we breathe out.

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Question 16
During respiration exchange of gases take place in

(a) trachea and larynx
(b) alveoli of lungs
(c) alveoli and throat
(d) throat and larynx

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