Doctors have injected a patient with a freely filtered substance that can be neither reabsorbed nor secreted. What is an example

Question

2 years ago

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of such a substance

1 answer:

julsineya [31] · Answer 1 · 2023-11-22T00:05:55+03:00

Inulin is an illustration of material of this type that cannot be reabsorbed or secreted.

How does inulin avoid being both reabsorbed and secreted?

Due to its special characteristics, inulin is the only chemical whose clearance is precisely equal to the glomerular filtration rate (GFR).
Although inulin is readily passed across the glomerular capillaries, neither is absorbed into the body nor released after filtering.
As a result, the volume of inulin filtered and excreted will be the same. Because of these factors, inulin is referred to as a glomerular marker.
The clearance ratio, which is the comparison between the clearance of any drug (x) and the clearance of inulin, is used to express this comparison. Thus,

Clearance ratio = $C_{X} / C_{inulin}$

Therefore it can be concluded that inulin cannot be released or reabsorbed after being injected into a patient.

Learn more about inulin here:

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