please i need help with this question. its the same question en , and drag to th

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please i need help with this question. its the same question

en , and drag to the Favorites Bar folder. Or import from another browser. Import favorites al of these Question 4 How does the picture labeled a) relate to stenting and blood Slow? Selected Answer increased vescel radias causes decreased bloodn Answers reased vassel radius causas Increasad biood fo ased veses radius causes increased blood flow ased vessel radius causes decreased bloed low blood flow decreased vesael radius causes detroased b

Explanation / Answer

The correct answer will be "Increased vessel radius causes increased blood flow"

The effect of vessel radius on resistance is inverse: Given the same volume of blood, an increased radius means there is less blood contacting the vessel wall, thus lower friction and lower resistance, subsequently increasing flow. A decreased radius means more of the blood contacts the vessel wall, and resistance increases, subsequently decreasing flow. This is because resistance is inversely proportional to the radius of the blood vessel (one-half of the vessel’s diameter) raised to the fourth power (R = 1/r4). This means, for example, that if an artery or arteriole constricts to one-half of its original radius, the resistance to flow will increase 16 times. And if an artery or arteriole dilates to twice its initial radius, then resistance in the vessel will decrease to 1/16 of its original value and flow will increase 16 times.

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