RESPIRATORY SYSTEM
ALVEOLI
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The movement of Oxygen and Carbon Dioxide between the bronchi and pulmonary artery
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The movement of Oxygen and Carbon Dioxide between the alveoli and bloodstream
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The movement of Oxygen and Carbon Dioxide between the heart and lungs
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The movement of Oxygen and Carbon Dioxide between the nasal cavity and heart
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Detailed explanation-1: -During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
Detailed explanation-2: -This exchange of oxygen and carbon dioxide is called respiration.
Detailed explanation-3: -Diffusion is a process in which transport is driven by a concentration gradient. Gas molecules move from a region of high concentration to a region of low concentration. Blood that is low in oxygen concentration and high in carbon dioxide concentration undergoes gas exchange with air in the lungs.
Detailed explanation-4: -Once the venous blood returns to the lungs, the carbon dioxide diffuses out of the bloodstream, through the capillaries, and into the alveoli from where it is expelled, during which time oxygen simultaneously binds with hemoglobin to be carried back to the tissues.