Arrange the following steps of respiration a. Utilisation of O2 by cells b. Breathing c. diffusion of O2 and CO2 between blood and tissues d. transport of gases by the blood e. diffusion of gases across alveolar membraneb e d a cb d e a cb e d c ab d c a e
Question
Arrange the following steps of respiration a. Utilisation of O2 by cells b. Breathing c. diffusion of O2 and CO2 between blood and tissues d. transport of gases by the blood e. diffusion of gases across alveolar membraneb e d a cb d e a cb e d c ab d c a e
Solution
To arrange the steps of respiration, we need to follow the correct sequence:
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Breathing (b): This is the process of inhaling and exhaling air, which involves the movement of air into and out of the lungs.
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Diffusion of gases across the alveolar membrane (e): After inhaling, oxygen (O2) from the air diffuses across the thin walls of the alveoli in the lungs into the bloodstream, while carbon dioxide (CO2) diffuses from the bloodstream into the alveoli to be exhaled.
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Transport of gases by the blood (d): Once oxygen is in the bloodstream, it binds to hemoglobin in red blood cells and is transported to the body's tissues. At the same time, carbon dioxide produced by the cells is carried back to the lungs through the bloodstream.
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Diffusion of O2 and CO2 between blood and tissues (c): In the tissues, oxygen is released from the red blood cells and diffuses into the cells, where it is used for cellular respiration. At the same time, carbon dioxide produced by the cells diffuses into the bloodstream to be transported back to the lungs.
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Utilization of O2 by cells (a): Inside the cells, oxygen is used in the process of cellular respiration to produce energy in the form of ATP. This energy is essential for the functioning of the cells and various physiological processes in the body.
Therefore, the correct arrangement of the steps of respiration is: b, e, d, c, a.
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