VASCULAR
TYPES OF ARTERIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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exocytosis and endocytosis by endothelial cells
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diffusion from areas of higher concentration to lower concentration
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pinocytosis using fluid-filled vesicles
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active transport (using ATP) by protein carriers of endothelial cells
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Detailed explanation-1: -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-2: -At the end of each bronchiole are tiny air sacs called alveoli. This is the place where the exchange of oxygen and carbon dioxide actually happens. Each person has hundreds of millions of alveoli in their lungs. This network of alveoli, bronchioles, and bronchi is known as the bronchial tree.
Detailed explanation-3: -Diffusion is the net movement of molecules from a region of its high concentration to a region of its low concentration. In other words, it is the movement of a substance down a concentration gradient. CO2 diffuses from the blood to the alveoli.