Question

Question #0b4f7

Answer 1

The blood vessels with the highest concentration of glucose, urea, and oxygen are the renal arteries.

Explanation:

`1)` The function of the kidney is to remove substances from the blood that are harmful or that are present in excess.

As the blood circulates throughout the body, it accumulates (among other things) urea and glucose.

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`2)` Because it is an artery, the renal artery is oxygen-rich, carrying from the heart oxygenated blood that supplies the cells of the kidney with their oxygen.

So just before the blood enters the kidney by way of the renal artery, it has a high concentration of oxygen, urea, and glucose.

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Once the blood is in the kidney, the oxygen is used for the oxygenation of the cells, and waste products (such as urea) and surplus blood components (glucose if present in excess) are removed by glomerular filtration from the blood.

Here's a Khan Academy discussion of glomerular filtration:
https://www.khanacademy.org/test-prep/mcat/organ-systems/the-renal-system/a/renal-physiology-glomerular-filtration

• Waste products are excreted from the body as urine.
• Carbon dioxide is added to the blood by diffusion from the cells of the kidney. It leaves the kidney via the renal vein, which travels back to the heart to swap oxygen and carbon dioxide in the lungs.

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Entering the kidney by the renal artery:

• Oxygen from the lungs
• Urea as a waste product of protein metabolism
• Glucose
• Other components

Leaving the kidney by the renal vein:

• Deoxygenated blood high in carbon dioxide

Leaving the kidney as urine by the ureters:

• Urea
• Other components

Here's a diagram showing the renal artery, the renal vein, and the ureter going to the bladder.

https://myhealth.alberta.ca/Health/aftercareinformation/pages/conditions.aspx?hwid=uh4630

Here's a video that describes the functions of the kidney: