The lowest blood concentration of nitrogenous waste occurs in the a. hepatic vein, b. inferior vena cava, c. renal artery, d. renal vein.

Video transcript

Hi, everyone. Let's look at our next question. Which of the following renal blood vessels will have blood that is predominantly free of nitrogenous wastes. A cortical radiate vein, B, arcuate vein, C, interlobar vein, D, renal vein or E all of the above. So let's notice that all of our questions, all of our answer choices here are veins and we're used to thinking of veins versus arteries in terms of the heart, whether they're going away or towards the heart. But in terms of the kidneys, there's another distinction between veins and arteries that's useful. So arteries carry the unfiltered blood into the kidney and then the blood is filtered in the glomeruli that bundle of capillaries and then from the Glo Marius, it goes into the veins in the kidney which then carry that filtered blood back to the heart. So when we think about the fact that our question is asking us which of these blood vessels will have blood that is free of nitrogenous wastes. Because all of our answer choices are veins. We know that our answer must be choice. E all of the above, all of them are carrying already filtered blood. So it will be free or relatively free of nitrogenous waste at this point. So, since we have these several answer choices, just to be a little more thorough, let's just go through where each of these is found. We have um from the glome, you have the afferent arterial and from there, the blood will travel to the cortical radiant vein which we see here in choice. A and then into the inter lober vein, which is choice C and then into the renal vein. And I see we've missed one. The arcuate vein should be between the cortical radiate vein and the interlobar vein. So I've just added that in there, the interlobar vein then into the renal vein, then from there that drains into the inferior vena cava and heads back into the heart. So our answer choices A through D are incorrect just because they're not a complete answer. The answer to which of the renal blood vessels have blood predominantly free of endogenous waste is choice. E all of the above, all of these choices given to us. See you in the next video.