Doctors have injected a patient with a freely filtered substance that can be neither reabsorbed nor secreted. What is an example
1 answer:
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 =
Therefore it can be concluded that inulin cannot be released or reabsorbed after being injected into a patient.
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Of the examples listed, and given the definition of patternicity, we can say that the best example is that of the Constellations. Option A is correct.
Patternicity is a tendency displayed by most humans. It is the tendency to perceive patterns and relate them to otherwise unrelated objects. Some examples of this that are seen commonly are:
- Constellations
- Seeing figures in clouds
- Comparing birthmark shapes to everyday objects
Constellations are groups of stars that we perceive to form a pattern or figure of some kind. There are many constellations and although they have served navigational purposes among others throughout the years, their very existence is an example of patternicity given that each star is individual and has no relation to one another nor the figures we perceive them to form.
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