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Due to its partial pressure gradient, carbon dioxide diffuses from cells into tissue fluid and into the ________; in the lungs, carbon dioxide diffuses into the ________. a. alveoli; bronchioles b. bloodstream; bronchioles c. alveoli; bloodstream d. bloodstream; alveoli
Human Biology (MindTap Course List)
Human Biology (MindTap Course List)
Due to its partial pressure gradient, carbon dioxide diffuses from cells into tissue fluid and into the ________; in the lungs, carbon dioxide diffuses into the ________.
- a. alveoli; bronchioles
- b. bloodstream; bronchioles
- c. alveoli; bloodstream
- d. bloodstream; alveoli
Introduction: The process of gas exchange that occurs between an organism and its environment is known as respiration. For cellular respiration, most of the animal cells need a continuous oxygen supply. During respiration, oxygen is inhaled from the environment and transported to individual cells of the body. Carbon dioxide produced during the cellular respiration is exhaled from the body to the environment.
Explanation of Solution
Reason for the correct answer:
Option d. is given as “bloodstream; alveoli”.
Due to aerobic cellular respiration in the cell, carbon dioxide is produced as a waste product. Hence, it is more in metabolically active cells than in blood capillaries. Due to partial pressure gradient, carbon dioxide diffuses from the metabolically active cells into tissue fluid then into the blood capillaries. Blood capillaries carry the carbon dioxide toward the lungs, and carbon dioxide diffuses into the alveoli.
Hence, the correct answer is option d.
Reasons for incorrect answers:
Option a. is given as “alveoli; bronchioles”...
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